{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.crab","code":"thing-crab","url":"https://ver.cy/models/thing/crab/","name":"crab","alternateNames":["stone crab","Menippe mercenaria","hard-shell crab","soft-shell crab","soft-shelled crab","rock crab","Cancer irroratus","swimming crab","blue crab","Callinectes sapidus","fiddler crab","pea crab"],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"noun.animal","plane":"PHY","domain":["PHY.LIV"],"industry":[],"navPath":"","tags":["animal"],"facets":{"substance":"living","origin":"natural","agency":"autonomous","mobility":"self-moving","scale":"not-applicable","affordances":["observable"]}},"whatItIs":"A crab, in the strict zoological sense, is a decapod crustacean of the infraorder Brachyura, typically bearing stalked eyes, a broad, dorsoventrally flattened carapace, a reduced abdomen folded beneath the thorax, and a first pair of legs modified into pincers.","purpose":"Enable an agent to recognise a crab, distinguish taxon-level knowledge from an individual animal's condition, and judge appropriate observation, handling and habitat actions.","scope":{"in":["Identification against the registry's crab body plan, with allowances for immature stages and damaged individuals","Taxonomic assignment and explicit separation of taxon, population and individual records","Carapace, appendage, abdominal and moulting condition","Life stages, reproductive condition and species-dependent sexual differences","Habitat requirements, population context and constraints on interacting with living crabs"],"out":["Crab meat, prepared food and seafood product quality","Fishery enterprises, commercial catch inventories and supply chains","Aquarium equipment and enclosure construction","Other decapods as independently modelled organism kinds","Cancer, zodiac signs and other non-organism meanings of crab"],"boundaries":[]},"distinguishingFeatures":["Test the combined body plan: a broad, flattened carapace, stalked eyes, pincers and a reduced abdomen folded beneath the thorax; no single feature establishes identity.","Contrast the folded abdomen with the conspicuous, extended abdomen of typical lobsters, crayfish and shrimps.","Distinguish a naturally folded abdomen from the soft, shell-sheltered abdomen typical of hermit crabs; a carried shell is not the crab's carapace.","Check appendage arrangement and taxonomic characters before treating a crab-shaped anomuran as a true crab; outline and sideways movement are insufficient.","For larvae or animals missing limbs, use stage-appropriate identification evidence rather than demanding the intact adult body plan."],"structure":{"bundles":[{"id":"crab-identity-and-boundaries","name":"Crab identity and boundaries","description":"Resolve what the common name denotes and what biological subject an assertion concerns.","layers":[{"id":"body-plan-recognition","name":"Body-plan recognition","description":"Evaluate the registry definition using observable anatomy and stage-sensitive exceptions.","findings":[{"id":"diagnostic-anatomy-evidence","name":"Diagnostic anatomy evidence","description":"Record evidence for the carapace, stalked eyes, folded abdomen and chelae, including features that could not be observed.","questions":[{"text":"Which visible characters support identifying this animal as a crab rather than another decapod?","id":"diagnostic-anatomy-evidence-q01","kind":"definition"},{"text":"Could immaturity, missing limbs or an obscured underside explain an apparent mismatch with the registry definition?","id":"diagnostic-anatomy-evidence-q02","kind":"boundary"}]}]},{"id":"taxon-and-subject-resolution","name":"Taxon and subject resolution","description":"Separate the common-name grouping, supported taxon and individual or population under observation.","findings":[{"id":"supported-taxonomic-assignment","name":"Supported taxonomic assignment","description":"Retain the accepted name at the supported rank, authority, identification evidence and verified external identifiers without inventing a crab-wide binomial.","questions":[{"text":"Which consulted authority supports the identification, authorship and any GBIF or NCBI identifier?","id":"supported-taxonomic-assignment-q01","kind":"provenance"},{"text":"Does this assertion concern a named taxon, a local population or one crab, and does its common-name usage include animals outside Brachyura?","id":"supported-taxonomic-assignment-q02","kind":"boundary"}]}]}]},{"id":"carapace-appendages-and-moulting","name":"Carapace, appendages and moulting","description":"Interpret size, external structures and physical condition through the crab's moulting cycle.","layers":[{"id":"carapace-and-chela-measurement","name":"Carapace and chela measurement","description":"Make external measurements comparable and preserve potentially diagnostic asymmetry.","findings":[{"id":"repeatable-size-and-form","name":"Repeatable size and form","description":"Record carapace landmarks, spine treatment and left-right chela differences rather than reducing size to an undefined overall length.","questions":[{"text":"What are the carapace width and length, and exactly which landmarks and spines were included?","id":"repeatable-size-and-form-q01","kind":"measurement"},{"text":"Is chela asymmetry supported as normal for this taxon and sex, or could damage and regeneration explain it?","id":"repeatable-size-and-form-q02","kind":"boundary"}]}]},{"id":"shell-renewal-and-limb-integrity","name":"Shell renewal and limb integrity","description":"Separate moulting observations, shed exoskeletons and injury evidence.","findings":[{"id":"moult-aware-condition-assessment","name":"Moult-aware condition assessment","description":"Preserve uncertainty when interpreting a soft shell, inactivity, detached limbs or an apparently empty body.","questions":[{"text":"What observations distinguish a living crab, a shed exoskeleton and a dead animal?","id":"moult-aware-condition-assessment-q01","kind":"boundary"},{"text":"What shell and appendage evidence supports the assigned moult state or an injury assessment?","id":"moult-aware-condition-assessment-q02","kind":"measurement"},{"text":"Does suspected moulting require deferring handling or changing the immediate holding conditions?","id":"moult-aware-condition-assessment-q03","kind":"action"}]}]}]},{"id":"life-stages-and-reproduction","name":"Life stages and reproduction","description":"Represent development and reproduction without imposing one species' life cycle on every crab.","layers":[{"id":"developmental-stage","name":"Developmental stage","description":"Resolve stage using taxon-specific developmental evidence.","findings":[{"id":"stage-specific-identification","name":"Stage-specific identification","description":"Use appropriate larval, juvenile or adult characters and leave the developmental pathway unresolved until supported.","questions":[{"text":"Which developmental stage is supported, and what characters distinguish it from adjacent stages?","id":"stage-specific-identification-q01","kind":"definition"},{"text":"What source establishes this taxon's developmental sequence and any changes between larval and adult habitats?","id":"stage-specific-identification-q02","kind":"provenance"}]}]},{"id":"sex-maturity-and-brooding","name":"Sex, maturity and brooding","description":"Record sexual characteristics, maturity evidence and egg carriage as distinct observations.","findings":[{"id":"reproductive-evidence","name":"Reproductive evidence","description":"Document abdominal or appendage characters used for sex determination and record visible eggs without treating body size alone as proof of maturity.","questions":[{"text":"Which taxon-appropriate characters support sex and maturity, and how certain is each determination?","id":"reproductive-evidence-q01","kind":"measurement"},{"text":"Are eggs visibly carried beneath the abdomen, and what disturbance or collection constraints follow in this locality?","id":"reproductive-evidence-q02","kind":"action"}]}]}]},{"id":"habitat-and-ecological-relationships","name":"Habitat and ecological relationships","description":"Connect a crab to its environmental requirements, shelter use and ecological interactions.","layers":[{"id":"habitat-and-range","name":"Habitat and range","description":"Distinguish observed location from established habitat suitability and native distribution.","findings":[{"id":"environmental-fit","name":"Environmental fit","description":"Record water regime, substrate and environmental measurements alongside sourced requirements for the taxon and stage.","questions":[{"text":"What salinity, temperature, water access, substrate and shelter conditions were actually observed?","id":"environmental-fit-q01","kind":"measurement"},{"text":"Which evidence establishes whether this locality is within the taxon's native, introduced or unresolved range?","id":"environmental-fit-q02","kind":"provenance"}]}]},{"id":"feeding-shelter-and-interactions","name":"Feeding, shelter and interactions","description":"Represent observed resource use and interactions without assigning a universal crab diet or social pattern.","findings":[{"id":"observed-ecological-behaviour","name":"Observed ecological behaviour","description":"Record feeding, burrowing, refuge use, competition and predation evidence with observation context.","questions":[{"text":"What feeding or shelter-use behaviour was directly observed, and what remains inferred from species accounts?","id":"observed-ecological-behaviour-q01","kind":"provenance"},{"text":"What evidence of aggression, predation or shelter competition affects a proposed shared enclosure or habitat intervention?","id":"observed-ecological-behaviour-q02","kind":"action"}]}]}]},{"id":"condition-conservation-and-intervention","name":"Condition, conservation and intervention","description":"Use individual observations and population context to constrain actions involving a crab.","layers":[{"id":"individual-condition-and-handling","name":"Individual condition and handling","description":"Assess observable function and exposure before selecting an interaction.","findings":[{"id":"condition-guided-interaction","name":"Condition-guided interaction","description":"Consider movement, visible injury, moult state and environmental exposure when choosing observation, handling or specialist assessment.","questions":[{"text":"What changes in movement, posture, limb use or visible tissue condition have been observed, and over what interval?","id":"condition-guided-interaction-q01","kind":"measurement"},{"text":"What taxon-appropriate handling method and environmental conditions are supported for the proposed interaction?","id":"condition-guided-interaction-q02","kind":"action"}]}]},{"id":"population-status-and-permitted-actions","name":"Population status and permitted actions","description":"Attach conservation assessments and legal constraints to their actual taxonomic, geographic and temporal scope.","findings":[{"id":"sourced-action-constraints","name":"Sourced action constraints","description":"Resolve relevant assessments and rules before collection, movement or release, retaining unassessed status where no assessment is found.","questions":[{"text":"What conservation assessment applies to the identified taxon or population, and what are its assessment year and geographic scope?","id":"sourced-action-constraints-q01","kind":"provenance"},{"text":"Which current local rules and ecological considerations govern collecting, transporting or releasing this crab?","id":"sourced-action-constraints-q02","kind":"action"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of crab this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of crab this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of crab this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-standards-and-regulation","name":"Standards and regulation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these standards and regulation hold for the sense of crab this model covers, and on what evidence?","id":"evidence-standards-and-regulation-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of crab this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of crab this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these regional variation hold for the sense of crab this model covers, and on what evidence?","id":"evidence-regional-variation-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of crab this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Identify crabs and record sightings for biodiversity databases.","Handle crabs gently and return wild ones where found.","Report catch in line with fishery rules."],"mustNot":["Keep or kill crabs in ways that cause avoidable suffering.","Take undersized, berried or protected crabs.","Move non-native crabs between waters.","Serve crab to someone with a declared shellfish allergy."],"requiresHuman":["Commercial harvest decisions.","Killing crabs for food or research."]},"ethics":{"considerations":["Crabs are increasingly recognised as sentient and able to feel pain.","Invasive crabs damage ecosystems and fisheries."],"affectedParties":["Crabs","Fishers","People with shellfish allergy"]},"owners":{"steward":"Nobody when wild; fishery authorities manage harvest.","roles":[],"masterSystems":["Fishery catch records","Biodiversity occurrence databases"]},"relations":[{"target":"oewn-01978787-n","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.crab","Open English WordNet: oewn-01979598-n"]},"properties":{"applicability":"required","items":["Record subject: organism kind | taxon | population | individual | observation","Taxonomic identification: accepted taxon, rank, authority and date, consulted taxonomic source, identifiers where verified, identification confidence","Carapace dimensions: width and length in mm, with measurement landmarks and inclusion or exclusion of spines","Appendage condition: observed walking legs and chelae; intact | missing | regenerating | injured | unassessed, by side and position","Moult condition: premoult | moulting | recently moulted | intermoult | unresolved, with supporting observations","Life stage and reproductive condition: species-appropriate stage; maturity, sex determination method and externally carried eggs where observed","Habitat association: water or terrestrial setting, substrate, shelter, depth or shore position, locality and observation date","Environmental exposure: temperature in °C; salinity with scale stated; dissolved oxygen in mg/L where applicable; humidity in % where relevant","Conservation and interaction constraints: taxon assessment and assessment year; population or locality; applicable jurisdiction, rule source and effective date"]},"recognition":{"applicability":"required","items":["Broad flattened shell with a short tail tucked underneath.","Five pairs of legs, the front pair with claws; often walks sideways."]},"capabilities":{"applicability":"required","items":["Document diagnostic views and measurements to support or revise an identification.","Assess observed activity, shell condition, limb damage and possible moulting without equating uncertainty with illness.","Compare a proposed holding environment with verified requirements of the identified crab and life stage.","Determine whether handling, collection, transport or release is supported by animal condition, locality and applicable rules.","Track individuals or populations across repeated observations while preserving identification uncertainty."]},"hazards":{"applicability":"required","items":["Pinch injuries from claws.","Shellfish allergy and poisoning from contaminated crabs."]},"interfaces":{"applicability":"required","items":["The International Code of Zoological Nomenclature, issued by the International Commission on Zoological Nomenclature, governs the scientific naming of crabs."]},"context":{"applicability":"required","items":["Crabs occur in marine, freshwater and terrestrial habitats, where their ecological roles vary by species.","They are encountered in wildlife observation, fisheries, aquaculture and food preparation, where identification and animal condition inform appropriate handling."]}},"sources":[{"title":"Open English WordNet 2024, synset oewn-01979598-n","url":"https://en-word.net/id/oewn-01979598-n","note":"sense and gloss of the concept"},{"title":"Wiktionary: crab","url":"https://en.wiktionary.org/wiki/crab","note":"word senses and usage"}],"openQuestions":["Does vr.tr.crab cover only true crabs in Brachyura, or also crab-named anomurans, and which existing registry models determine that boundary?","Which consulted taxonomic authorities and diagnostic references should govern identification, authorship and GBIF or NCBI identifier reconciliation?","Which life-stage, sexual-dimorphism and developmental exceptions require explicit branches rather than general crab-level prompts?","What taxon- and stage-specific evidence is available for environmental tolerances, diet, moult interpretation and handling?","Which identified taxa and populations require native-range verification, dated conservation assessments and locality-specific collection or release rules?"],"resources":{"spec":"/models/things/publications/thing-crab/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-crab/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T08:53:21Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T12:16:27+00:00: completeness 1.00; sense: WordNet gloss; 2 live sources; review by codex: pass"},"score":1.0}}