As a fish swims through water, the dorsal fin stabilizes it and keeps it from rolling over. But over time, many fish have evolved different uses and appearances for these skin flaps.

However, 332 days after the wounded shark was photographed, divers spotted the same shark, identifiable by the NOAA dart tag which remained attached to the base of its dorsal fin. There was no ...

The Moorish Idol is a striking marine fish known for its distinctive black, white, and yellow bands and elongated dorsal fin.

Part of the dorsal fin extends from the head, with a tip of glowing bacteria that invites squids, worms, and other animals to get a little closer. That's when the anglerfish suctions in its feast.

The fish features silver scales, a fiery orange head tassel and a dorsal fin traversing its body from head to tail. This latest specimen washed up on a beach in Chile. You are viewing 1 of 3 ...

A striking fish that lives at the bottom of the Atlantic Ocean has evolved legs – but not just for walking. These appendages are a novel sensory organ like a tongue, which they use to find prey ...

Some types of “walking” fish called sea robins can use their taste bud-covered legs to detect prey buried beneath the sandy covering of the seafloor.

This robot fish is "as silent as a spy" — and could help researchers learn even more about the ocean 01:05. The mysteries of the ocean abound. And now, a group of student researchers is trying ...

Ocean pout live in frigid waters from Labrador in Canada to North Carolina and have evolved a blood protein that serves as antifreeze. When you purchase through links on our site, we may earn an ...

As a fish swims through water, the dorsal fin stabilizes it and keeps it from rolling over. But over time, many fish have evolved different uses and appearances for these skin flaps.