These tiny deep-water fish grow only about 4-inches long, and they don't swim. They "walk" about 130-feet down looking for prey, which they attract with the extra-long spine on their dorsal fin.

According to the National Ocean Service, its nearly 70 miles per hour top speed makes it one formidable fish. Accompanied by their iconic dorsal fin ... slow their target down, which makes ...

Fins: Help a fish move. The top fins are called dorsal fins. If there are two dorsal fins, the one nearest the head is called the first dorsal fin and the one behind it is the second dorsal fin.

Photographer David Jara Boguñá filmed a humpback anglerfish (Melanocetus johnsonii, a species of black seadevil) swimming ...

Its teeth are designed not so much to grab or slice fish but to prevent them from ... In addition to their paired fins, the second dorsal and anal fins also have stout, muscular lobed bases.

The largemouth’s dorsal fin, however, has a deeper indent, to the point where it can appear to be two separate fins with a break in the middle. The color and patterns on the sides of these fish ...

Their backs and tall dorsal fins glistened in the Arctic ... s study showing them daintily eating one fish at a time rather than gluttonously gulping down entire schools. Orca pods that lost ...

"It is a deep-water fish that spends time floating vertically in the water column to camouflage itself, trailing the elaborate red first spines of its dorsal fin and pelvic fins." The man in the ...

This aggressive fish is native to China ... and canine teeth on their lower jaw. Their long dorsal fin, which runs much of the length of their body, and a powerful anal fin make them speedy ...

Two deputies from the Volusia Sheriff's Office helped the Mola Mola fish into deeper water Kelli ... They are clumsy swimmers, waggling their large dorsal and anal fins to move and steering ...

So, the cause cannot be captivity alone. Ultimately, what's going on is the collagen in the dorsal fin is breaking down. One reason this may happen is from temperature. Warmer temperatures can ...