Click on the name of a fish part to see the definition.

Those most in jeopardy were the smaller fishes with specialised eating and sheltering habits. []
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One family, the , is of commercial interest with fisheries found in north-western Europe, eastern North America, Africa, and East Asia. In Europe and North America, the tail meat of fish of the genus , known as monkfish or goosefish (North America), is widely used in cooking, and is often compared to tail in taste and texture. In Asia, especially Korea and Japan, monkfish liver, known as , is considered a delicacy.
Fishing boat on the river forth
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While you won’t be boosting immunity with this fish, research does suggest a regular serving of Atlantic cod may help you stay trim. An eight-week study of 120 men published in Nutrition, Metabolism & Cardiovascular Diseases found that when combined with a calorie-restricted diet, participants who consumed cod five times a week lost more weight and visceral fat and showed better improvements in their blood pressure than those who ate cod just one or three times per week. Fishing boat on the river forth
Photo provided by FlickrA small fish, at the aquarium. I haven't yet identified what kind of fish it is.
Photo provided by FlickrA small fish, at the aquarium. I haven't yet identified what kind of fish it is.
Photo provided by Flickr
Apart from these similarities, however, many of the species in this group differ markedly from one another. Fin fish like salmon have gills, are covered in scales, and reproduce by laying eggs. Eels, by contrast, have worm-like bodies and exceedingly slimy skin. Lungfish gulp air. Whale sharks, the largest fish, give birth to live young and eat only tiny fish, squid, and plankton. Some species, such as the weedy sea dragon, are so bizarre they seem almost unreal.One reason fish are so diverse is that 70 percent of the planet is covered in water. The animals in this group live in a variety of habitats ranging from coral reefs and kelp forests to rivers, streams, and the open ocean. Another is that fish are very old on the evolutionary scale. According to fossil records, they have been on Earth for more than 500 million years! The total number of living fish species—about 32,000— is greater than the total of all other vertebrate species (amphibians, reptiles, birds, and mammals) combined.Fish have developed special senses, too. Because water transmits sounds, disperses chemicals, and conducts electricity better than air, fish rely less on their vision and more on their hearing, taste, and smell. Many can detect motion in the water using a special row of scales with sensors known as the lateral line. Others can find their prey and even navigate by detecting electrical charges.Fishes, with an , also serves as the plural possessive of fish—for example, the fishes’ scales were yellow. And of course fishes is the present-progressive (e.g., she fishes in the river).The plural of fish is usually fish, but fishes has a few uses. In biology, for instance, fishes is used to refer to multiple of fish. For example, if you say you saw four fish when scuba diving, that means you saw four individual fish, but if you say you saw four fishes, we might infer that you saw an undetermined number of fish of four different species.We think we know what fish are, but is a seahorse a fish? How about a jellyfish, or a catfish? Find out exactly how to work out what is a fish and what is not.