The Sulawesi coelacanth fish, Latimeria menadoensis, thought to be extinct for 70 million years, has been photographed for ...

Wild steelhead can be identified by their intact adipose fin – the small, fleshy fin located on the fish’s back.

The adipose fin, which is a small fleshy fin behind the larger dorsal fin, is found on a few fish. Officials say most trout and salmon with an adipose fin clip have a coded-wire tag in their snout.

More advanced fishes also have paired pectoral (lateral fins near the shoulder) and pelvic (lateral fins located near the hip) fins, as well as a small adipose fin (a small, fleshy, fin behind the ...

Classroom Activity for the NOVA program Ancient Creature of the Deep: In Fish Anatomy, students compare and classify a living fossil, the coelacanth, in relation to a moray eel and a bull shark.

image:Aetheretmon (facing right), an early ray-finned fish, swims in a 348-million-year-old river in Foulden, Scotland. Aetheretmon exhibits the ancestral state of two distinct 'tails', fleshy ...

Lobe-finned fish had rounded, fleshy fins, and they also had lungs along with their gills, which allowed them to breathe air.

Prehistoric lobe-finned fishes like Tiktaalik were anatomically very close to the earliest known tetrapods (four-legged animals), the first backboned critters to invade land some 360 million years ...

Fish fossils reveal how tails evolved, professor finds Date: December 6, 2016 Source: University of Pennsylvania Summary: A paleobiologist's study reveals that the tails of fish and the tails of ...