what about a clam or a marine worm
2006-09-15 12:27:50 · 12 answers · asked by Anonymous in Science & Mathematics ➔ Biology
in order to be classified as a fish, the living creature must have the following:
1. endoskeleton made of cartilage
2. bilateral symmetry
3. scales, fins and gills
4. poikilothermous (cold-blooded)
the creatures you mention do not have those characteristics so they are not classified as fish.
2006-09-15 12:44:00 · answer #1 · answered by loveholio 5 · 0⤊ 0⤋
A crab is not a fish. It is a crustacean.
A clam is not a fish. It is a mollusk.
I am guessing that a marine worm is also not a fish, but I do not know what it is.
2006-09-15 12:31:03 · answer #2 · answered by Mr. G 6 · 1⤊ 0⤋
A fish is a cool blooded animal with a backbone, gills and fins, living in water......and i guess a crab does not posses all these qualities.....den its not a fish........a crab is crustacean and a clam or marine worm is a mollusk.....
2006-09-15 12:42:34 · answer #3 · answered by cutemiss 1 · 0⤊ 0⤋
Crabs are crustaceans, clams are mollusks (specifically bivalves) and marine worms can be all kind of things (annelids, nidarians, etc...), but none of them are fish.
Everything you named is an invertebrate except for the whale. Fish are vertebrates, and fish have gills (check the whale for gills and all you'll find is a blow hole).
2006-09-15 12:31:56 · answer #4 · answered by daspook19 4 · 3⤊ 0⤋
Most crabs are crustaceans. Most marine worms are annelid and clams are mollusks.
and you are right whales are not fish. They are mammals which mean they feed their young milk...they also have hair.
2006-09-15 12:39:47 · answer #5 · answered by luckybluebunny 3 · 0⤊ 0⤋
Crabs are not fish they are crustaceans and members of the phylum arthropoda.
Clams are molluscs.
2006-09-15 14:03:18 · answer #6 · answered by Gene Guy 5 · 0⤊ 0⤋
Crabs are Crustaceans silly!
*sings "Under the Sea..."*
2006-09-15 12:31:03 · answer #7 · answered by Sara 6 · 2⤊ 0⤋
crabs are crustaceans clams/worms are mollusks
2006-09-15 12:29:55 · answer #8 · answered by Delete System32 5 · 3⤊ 0⤋
None of those are fish
2006-09-15 12:29:49 · answer #9 · answered by Anonymous · 2⤊ 0⤋
School isn't the same these days.
A crab is a mammal
2006-09-15 12:31:05 · answer #10 · answered by K.O. 4 · 1⤊ 3⤋