shark
Let an agent explain sharks and their biology, relay diversity, evolution and conservation from ichthyological sources, describe sharks as food and in fisheries with regulation attributed, and distinguish sharks from rays, bony fishes and dolphins and from exaggerated fears.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain sharks and their biology, relay diversity, evolution and conservation from ichthyological sources, describe sharks as food and in fisheries with regulation attributed, and distinguish sharks from rays, bony fishes and dolphins and from exaggerated fears.
A group of cartilaginous fishes of the subclass Elasmobranchii characterised by a cartilaginous skeleton, five to seven gill slits, pectoral fins not fused to the head and skin covered in dermal denticles, ranging from the dwarf lanternshark to the whale shark, the largest fish, with over 500 living species and a fossil record of more than 400 million years including extinct forms such as Paracestracion; sharks are apex and mesopredators in marine ecosystems, are fished for meat, fins and other products, and many species are threatened by overfishing.
What it is for: Not applicable; an animal group.
It can be explain biology and diversity; relay evolution and conservation; describe fisheries and food; distinguish from similar animals.
Distinguishing features
Cartilaginous skeleton
Gill slits
Dermal denticles
Electroreception
What it looks like
Streamlined cartilaginous fishes with gill slits, a heterocercal tail and rough skin.
Physical character
living species: over 500 count
whale shark length: up to about 18 m
fossil record: over 400 million years
species threatened: about one third ratio - IUCN assessments
How it is recognised
Cartilaginous fish with gill slits and denticles
Over 500 species from lanternsharks to whale sharks; fossil sharks such as Paracestracion
Rays are flattened relatives; bony fishes have bone skeletons; dolphins are mammals
Related models
is a kind of - in registry terms
is a kind of - in registry terms
belongs to - with rays
is threatened by - and finning
In practice
Families and kinds
ground sharks such as requiem and hammerhead sharks
mackerel sharks such as the great white and mako
carpet sharks including the whale shark
dogfish and lanternsharks
angel, saw and other orders
extinct sharks such as Paracestracion and megalodon
sharks as food such as shark meat and fins
Identifiers
superorder Selachimorpha sharks
Standards and regulation
CITES listings for many shark species
Fisheries management and finning bans
Regional fisheries organisation rules
Food safety rules on mercury in shark meat
Failure modes and hazards
Exaggerated fear of shark attacks
Overfishing and finning
Mercury in shark meat
Confusing sharks with rays or dolphins
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.shark-2
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What sharks are.
Science.
Definition
Definition and features.
Definition
Definition.
- What are sharks, and how do they differ from rays, bony fishes and marine mammals? definition
- Is the question about sharks in general, a species, sharks as food or safety? boundary
Diversity
Diversity.
Diversity
Diversity.
- What are the main shark orders and notable species, from lanternsharks to whale sharks? definition
- Which entry fits the specific species? action
Biology Biology and evolution.
Science.
Biology
Biology.
Biology
Biology.
- How do sharks sense, feed, reproduce and migrate? provenance
- Which references are standard? provenance
Evolution
Evolution.
Evolution
Evolution.
- How did sharks evolve, and what do fossils such as Paracestracion and megalodon show? provenance
- Which sources are cited? provenance
People Sharks and people.
Attribution.
Fisheries
Fisheries and food.
Fisheries
Fisheries.
- How are sharks fished and eaten, and what rules govern finning and trade, with positions attributed? provenance
- Is the presentation neutral? boundary
Safety
Safety.
Safety
Safety.
- How rare are shark attacks, and what do experts advise? provenance
- Which entry fits shark attack? action
Context Conservation and culture.
Context.
Conservation
Conservation.
Conservation
Conservation.
- Which sharks are threatened, and what conservation measures exist? provenance
- Which entry fits shark conservation? action
Culture
Culture.
Culture
Culture.
- How are sharks portrayed in culture, from Pacific traditions to Jaws? provenance
- Which entry fits sharks in culture? action
What the second pass must settle
- Should shark finning and specific orders be separate primary entries?
- How should ichthyological sources be linked?
- The registry entry has a merged alias naming a fossil genus; should it be split off?