Some do. For example, dolphins and whales are marine mammals and they have fins.
well.. a mammoth is a mammal and it has legs and fish are fish but are sort of mammals!!
Dolphins, Whales.
Whales and fish
yes
fish
A reptile?
a fish
I do not know of any mammal (mammals are the only animals to have hair) that has fins (fins are the preserve of fishes), but a sea-lion is an animal that is covered in hair and has "flippers".
Animals that use fins to move are whales, dolphins, sharks, and various types of fish. A fin will generate thrust and propel the animal through the water.
there are none.
These are structural. They're to do with an animal's structure. Behavioural means to do with how an animal behaves, or responds.
fins, tails, and any other appendages really.
you can tell by if it has more than 7 fins
fish - fins cockroach-air tube earthworm- skin
Triceratops was a quadrupedal land animal. It didn't have wings or fins, and technically the end of the forelimb is a foot, not a hand, unless the animal is at least partly bipedal. Its front feet each had three toes.
Pterois means winged, and pdila means fins, so it means winged fins. Probably about some aqatic prehistoric animal.