. Half hours with fishes, reptiles, and birds . lve feet in length, fol-lowed the fishing boats and robbed them of fish despite acombined attack against it. Equally remarkable is the thresher shark (Fig. 32), theupper lobe of the tail of which is almost as long as the body of the fish. Itis said to use thiswhiplash to killsmall fry and isknown to beat the FIG. SHARK. Watei~ With lt when making its is assumed by many that the so-called sea serpentis a deep sea shark, such an eel-shaped creature havingbeen found in Japanese waters. Among the small sharks one is luminous o
. Half hours with fishes, reptiles, and birds . lve feet in length, fol-lowed the fishing boats and robbed them of fish despite acombined attack against it. Equally remarkable is the thresher shark (Fig. 32), theupper lobe of the tail of which is almost as long as the body of the fish. Itis said to use thiswhiplash to killsmall fry and isknown to beat the FIG. SHARK. Watei~ With lt when making its is assumed by many that the so-called sea serpentis a deep sea shark, such an eel-shaped creature havingbeen found in Japanese waters. Among the small sharks one is luminous over its entiresurface; the dogfishes have a spine in front of each dorsalfin, while the little Port Jackson shark, common aboutSanta Catalina, California, has a peculiar pink nail-likespine in front of each dorsal fin. This shark lies coiledup among the rocks much of the time; its egg is aspiral, leathery object, that is a perfect mimic of theweed in which it lies. These sharks have several kindsof teeth, those in the back resembling THE SHARKS AND RAYS 61 Among the large forms is the great blue shark, whichattains a length of twenty-five or thirty feet. The whiteshark is even larger, and like it is to be dreaded in theopen sea. A huge helpless shark twenty feet long, withminute teeth is common in the Gulf of California, whereit is supposed to feed upon kelp. The large sharks often
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1906
