The bodies of fishes are usually spindle shaped and streamlined. This makes it easy to move in water. There are also air filled swim bladders to make the body buoyant.
The skeleton of the body axis is covered by strong muscles . They are arranged serially segment by segment. During swimming , the front part of the body curves in one side and the tail part remains in the opposite side. It forms a loops. Then quickly the body and tail curve to the other side. This makes a jerk and pushes the body forward. A series of such jerks make the fish swim ahead. Tis is aided by the fins of the tail.
The paired and unpaired fins mainly help to keep the balance of the body and to keep direction.
By swimming
The cast of Swimming with the Fishes - 2009 includes: Connor McAndrews as Mike Tom Saporito as Carl
Swimming
lateral fin
a zoologist who studies fishes
Pisces is latin for 'fishes'. Apparently, the Ancient Babylonians saw the constellation as two swimming fish.
The puffer fish, while popular for lampshades, is poisonous. DO NOT EAT PUFFER FISHES!
The Angler Fishes defence is hiding in the deep from their predator
In technical writing a description of a mechanism contains visual with label that make it easy for readers to follow. An example would be a description of a fan with images that list the parts.
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:) Ahem, most fishes move by alternately contracting paired sets of muscle on either side of their backbone.
Fighting, swimming, eating, defecating, smoking, and chronic masturbation.