Learn visual and behavioral cues to distinguish male from female bettas. Reviewed by Nick Saint-Erne Male bettas often have ...

Research on fossilized fish from the late Devonian period ... A CT scan of Tiktaalik’s fin skeleton, showing its dorsal rays (yellow) and ventral rays (cyan). (Illustration courtesy of Tom Stewart) ...

The typical dorsal fin is a triangular-shaped piece of skin wrapped around muscles and bony spines or rays that sits on a fish’s back, behind its head. As a fish swims through water, the dorsal ...

Interestingly, however, those neurons are completely separate from the ones which issue commands to the fish’s other three dorsal fins, located in the lower side of its ventral horn, called the ...

Called GhostBot, the robot copies the real fish’s undulating, ribbon-like ventral fin to propel itself through the water. New high-speed experiments show how, when waves travel along the robot ...

The Vermont Fish & Wildlife Department is stocking Vermont ... of the Eagle Lake strain to the Erwin-Arlee strain, clipped ventral fins will help anglers tell them apart. A rainbow trout missing ...

Coelacanths are difficult to classify. They have many characteristics in common with sharks, and yet in certain characteristics they more closely resemble other types of fish. In this activity ...

which they named "fishing motor neurons," and compared them with those of the other dorsal fins. To study this area, the researchers used tracer injections. Fish rely on the ventral horn of their ...

Research on fossilized fish details the evolution of fins as they began to transition ... fin ray was slightly larger and longer than the ventral, or bottom one. Tiktaalik's dorsal rays were ...

Coelacanths are difficult to classify. They have many characteristics in common with sharks, and yet in certain characteristics they more closely resemble other types of fish. In this activity ...