Fishes . CHAPTER II THE EXTERIOR OF THE FISH jORM of Body.—With a glance at the fish as a livingorganism and some knowledge of those structureswhich are to be readily seen without dissection, weare prepared to examine its anatomy in detail, and to note someof the variations which may be seen in different parts of thegreat group. In general fishes are boat-shaped, adapted for swift progressthrough the water. They are longer than broad or deep andthe greatest width is in front of the middle, leaving the com-pressed paddle-like tail as the chief organ of locomotion. But to all these statements th
Fishes . CHAPTER II THE EXTERIOR OF THE FISH jORM of Body.—With a glance at the fish as a livingorganism and some knowledge of those structureswhich are to be readily seen without dissection, weare prepared to examine its anatomy in detail, and to note someof the variations which may be seen in different parts of thegreat group. In general fishes are boat-shaped, adapted for swift progressthrough the water. They are longer than broad or deep andthe greatest width is in front of the middle, leaving the com-pressed paddle-like tail as the chief organ of locomotion. But to all these statements there are numerous fishes depend for protection, not on swiftness, but on thethorny skin or a bony coat of mail. Some of these are almostglobular in form, and their outline bears no resemblance to that. Fig. G.—Pine-cone Fish, Monocentris japoyiicus (HouttiUTi). Waka, Japan. of a boat. The trunkfish {Ostracion) in a hard bony box hasno need of rapid progress. i6 The Exterior of the Fish
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