The sea-fish differ in marked degree from those of the east coast of England. Plaice and cod, for example, are smaller here than those caught in the North Sea and the latter are scarce; and the haddock, one of the most important of east coast fish, is here almost unknown. Two characteristic fish of the south coast of Devon are the pollack, which reaches a great size, and the pilchard, confined to this county and to Cornwall. Many southern and even Mediterranean species find their way to these waters: notable examples are the gigantic tunny, one specimen of which weighed 700 pounds, the beautiful rainbow wrasse, one of the most brilliantly-coloured of all fish, and the boar-fish, which is sometimes quite common. A number of rare species, such as Montagu's sucker and the crystal goby, were first made known as British through being taken off the Devonshire coast. Stray examples of the tropical bonito, the flying-fish, the electric torpedo, and the sun-fish, one specimen of which weighed 500 pounds, and the splendidly-coloured opal or king-fish, have been recorded. Several kinds of sharks have been caught in these waters, including the blue shark, the spinous shark, covered all over with sharp prickles, the rare and formidable hammer-head, the huge thresher, and the still larger basking-shark. The latter is, indeed, the largest of British fish. Specimens have been caught measuring 30 feet in length, and weighing more than eight tons. Marketable marine-fish will be treated of in a later chapter. Rich as are the Devonshire seas in fish, they are richer still in crustaceans--crabs, lobsters, prawns, shrimps and their allies; and in this respect ours is the premier county of England. Among a multitude of species, two which have occurred nowhere else in Britain may be specially singled out. One of these is the burying-shrimp, _Callionassa subterranea_, a little creature something like a very small lobster, with one claw--sometimes the right and sometimes the left--very much larger than the other. It was one of Montagu's many discoveries, and was found two feet deep under the sand of the Kingsbridge estuary. The other rare species is the turtle-crab, _Planes minutus_, a few specimens of which have been drifted ashore on fronds of Sargasso weed. The "small grasshoppers" which Columbus saw floating in the sea a few days before he sighted the New World, were, it is believed, not grasshoppers, but turtle-crabs. Other and very beautiful forms of marine life, such as starfish, anemones, corals and other zoophytes, and sea-shells are very abundant. And in spite of the comparative scarcity of lime in the soil of Devonshire, the list of land and freshwater shells is a long one. It is remarkable that _Limnaea stagnalis_ and _Planorbis corneus_, two water-shells that are common in Somerset, are unknown in Devon. The pearl-bearing mussel, _Unio margaritifer_, is found in both the Taw and the Teign.