These voracious marine hunters have fearsome, sharp fangs and especially large mouths. 
any unfortunate victim targeted by a fangtooth.

For all their notoriety as deadly hunters of the deep, fangtooths are small fish that can themselves fall victim to larger hunters like tuna and marlin. Against such large predators, fangtooths have little defense. Young fangtooths additionally move assurance in opposition to predators in the shape of a spine on top of the head and another on the bottom edge of one of the bones that cover the gills. Baby fangtooths look so different from adults that, for about a hundred years, they were each thought to belong to separate species.

The flying fox (Epalzeorhynchos kalopterus) is a bottom-dweller that thrives in fast-flowing foothill rivers and streams of Borneo, Java and Sumatra in Indonesia of Southeast Asia. They are also found in Thailand. The flying fox is a popular freshwater community-aquarium fish that belongs to the Cyprinidae family. It is known to eat green algae. It is also known as kuonobarbi in the aquarium trade and is sometimes mistakenly referred to as the Siamese Algae Eater.

This is a transparent freshwater catfish with two long barbels. Standard lengths may range up to 8 cm (3.1 in) in nature, but aquarium specimens usually average around 6.8 cm (2.7 in) total length. The head is typically darker by comparison. Otherwise, they are transparent and most of their organs are located near the head.

The jaw-dropping story of European and American eels starts, not in the rivers where the adults are found, but in deep water in part of the western Atlantic known as the Sargasso Sea. In the case of the European eel, this is some 4,000 miles away from the home rivers of the adults. Larval eels (known as leptocephali) take up to three years to cover the distance from their place of birth to their eventual homes. For the American eel, the journey is much shorter, but it can still take the larvae about a year to complete the trip.

Some look like sponges, while others mimic algae-covered stones. Some even look just like seaweed—but no seaweed swallows victims in less than one-hundredth of a second.

Frogfish are close relatives of anglerfish,with which they share a number of characteristics. The most obvious of these is that they carry their own angling equipment in the form of a “rod and lure.” The rod consists of the first ray of the dorsal (back) fin while the lure, or bait, is a fleshy bit at the end that is used to attract prey. In the warty frogfish this lure not only looks like a fish, but is actually moved through the water as if it

As their name indicates, these cylinderlike fish have four eyes. At least, they give the impression of having four eyes. On closer examination, however, it can be seen that in fact they only have two eyes, just like most other fish. However, each eye has two colored strips of tissue that extend inward from the iris and meet in the center of the pupil. This effectively divides each eye into a top half and a bottom half, creating the

It must be disconcerting for a hunter to discover that the prey it is chasing suddenly disappears. Yet,this  is precisely what happens when flying fish are being pursued. When they sense danger, flying fish break through the water surface and put on a burst of speed using lightning-fast beats of their specially adapted tail—it can beat at up to fifty times per