The Nature of Squids The Nature of Squids Squids atomic bout 18 among the windup varied and odd of all invertebrates. They be mollusks of the Class Cephalopod, along with the nautilus, cuttlefish, and octopus. Squids ar exceedingly evolved, and throw off developed a number of traits un crude to most different mollusks. Fossil records of cephalopods have date back the Welsh Period (about 600 million years ago). Structurally, squids have only tenuous variations of a basic theme common to all cephalopods. They are spherical or cigar-shaped with monster fins used to poise movement when swimming.
Ten arms are easily rarified emerging from near the mouth 8 of these arms for each one have four rows of suck cups encircled by sound of chitinous (horny) hooks. These suction cups fork out a means of attaching to rocks or holding its food with a powerful grip. The other two arms are called tentacles, and are contractile and longer than the other eight. These tentacles have spatulate ...If you demand to get a right essay, order it on our website:
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