Alewife

Small and silvery gray with a greenish to bluish back tinge, the alewife usually has one small dark shoulder spot and sometimes other small dusky spots.

A small herring, the alewife is important as forage for gamefish in many inland waters and along the Atlantic coast. It is used commercially in pet food and as fish meal and fertilizer, and it has been a significant factor in the restoration of trout and salmon fisheries in the Great Lakes. The alewife can be distinguished from other herring by its lower jaw, which projects noticeably beyond the upper jaw.

Anchovies

What they lack in size, anchovies make up for in numbers. The largest shoals consist of countless millions of individuals, all creating their route through the untamed ocean 
in search of food.

Like all shoaling fish, anchovies convey with one another and so are equipped to swim in close formation. Their silvery sides help them do this by providing a visual aid. However, anchovies are unusual in that they can also use pulses of sound to keep in touch with each other when swimming at high speed. 

Anglerfish

An eager fish dashes in, mouth totally open, to swallow a wriggling worm. In a flash, it’s all over. However, it is not the worm that has been swallowed, but the ravenous fish itself.

The eager fish portrayed inverse has been tricked by one of the most incredibly solid and deceptive hunters of the seas; an anglerfish. Anglerfish are the fishy equivalent of human anglers, except that they come complete with a built-in “fishing rod” and “lure.”

Atlantic Salmon

Atlantic salmon are the “homing pigeons” of the fish world. After several years of living in the sea, they return to the same streams and rivers in which they were born, in order to breed.

Over countless generations, the Atlantic salmon has evolved into a fish whose extraordinary homing instincts can only be matched by very few other fish; the most famous of these being the European eel.The salmon’s instincts are so powerful that they make the yearly return to home waters totally predictable.

Arapaima

If some reports of its size are correct, the arapaima is the largest living species of freshwater fish in the world. Yet, despite its massive size, it is an amazingly gentle, caring parent.

This Amazon heavyweight is reported to grow to 16 feet in length. However, most reliable reports indicate that it grows to about two thirds of this size. Even so, the arapaima, or pirarucu, is a real giant. In areas away from those occupied by humans, the arapaima is believed to

Archerfish

In some tropical swamps, there are silent hunters beneath the surface that shoot down their prey—with jets of water. If this fails, they simply jump out and grab their meal.

The remarkable hunting skill described opposite belongs to the unusual and beautiful archerfish. Normally, these fish feed on insects and other small creatures that accidentally fall into the water, like so many other fish species do. Some archerfish also feed on mangrove plants. However, their eyes are always turned skyward, keeping an eye out for any insect that may land on a twig or leaf near the water surface. When an archerfish spots a potential victim, it silently swims up to the surface and positions itself within

Angelfish

Angelfish are colorful residents of coral reefs. They change their colors and patterns as they grow. Somtimes, the differences between the young and adults are so striking that they look like different species.

Along with their close relatives,the butterflyfish, angelfish are among the most visible inhabitants of tropical coral reefs. Most live in shallow water,and so they are easily spotted by swimmers and divers. This does not mean that all the species occur in large numbers,or in shallow water,however.Some species are not seen on most reef dives because they usually live in deep water.For example,the masked angelfish prefers to live in waters from around

Atlantic Tarpon

It may look nothing like an eel, but the Atlantic tarpon is related to these ancient snakelike fish. The evidence of this is to be found by looking at the tarpon’s newly hatched young.

Both eels and tarpon lay eggs. These bring forth out into ribbonlike hatchlings (youthful stages) regarded as leptocephali. The likenesses among the larval stage of both the aforementioned species intend that there is undoubtedly they are related. However, they closely look like one another when completely grown.The leptocephali, which look truly contrasting from the adults,migrate to beachfront zones. There they finish their growth and transform into the grown-up shape.

This relationship between tarpon and eels has had a long time to develop.

American Paddlefish

With a nose constructed similar to a paddle and a tremendous, toothless,gaping mouth, the American paddlefish is one ofthe most drastically atypical-looking fish to be found in thewhole of North America.

It could look furious, particularly when it opens its huge mouth to its full degree, but the American paddlefish is a tranquil fish that bolsters on little animals called plankton. It sifts these out of the water utilizing a succession of sievelike structures on its gills. The oar which gives the species its name might be over 2 feet in length in a thoroughly developed specimen, but researchers are not positively beyond any doubt what it does. In consideration of it is stuffed with unique sensing units, it is conceivable that it accommodates the fish spot its sustenance. It might in addition assist adjust the paddlefish as it swims through the water with its mouth totally open encouraging on mists of plankton; particularly when in a unyielding current. This is not known for certain, then again, after paddlefish that have lost their oar through damage can still food flawlessly well.

Ancient Friends

Seeing a paddlefish swimming in the wild, or in a public aquarium, it is difficult to believe that the species has been around since the age of dinosaurs. In fact, fossils of paddlefish found in rocks show that these fish have a very long history dating back some 135 million years at least. While most species of fish have bony skeletons, paddlefish have a skeleton made of a tough, elastic material called cartilage, except for the jaw. Cartilage is also found in the skeletons of another large group of primitive fish: the sharks and their relatives, the rays.