[Illustration: FILAMENTOUS GUNARD.—_Pelor filamentosum._] The only fish that builds itself a nest is the phycis: it makes it of sea-weed, and there deposits its eggs, which it defends from the attacks of enemies. The sea-swallow, being able to fly, bears a strong resemblance to the bird of that name; the sea-kite, too, flies as well. There is a fish that comes up to the surface of the sea, known, from the following circumstance, as the lantern-fish: thrusting from its mouth a tongue that shines like fire, it emits a most brilliant light on calm nights. Another fish, which, from its horns, has received its name, raises them nearly a foot and a-half above the surface of the water. The sea-dragon, again, if caught and thrown on the sand, works out a hole for itself with its muzzle, with the most wonderful celerity. CHAPTER IX. BLOODLESS FISHES. The varieties of fish which we shall now mention are those which have no blood: they are of three kinds—first, those which are known as “soft;” next, those which have thin crusts; and, lastly, those which are enclosed in hard shells.[139] The soft fish are the loligo, the sæpia, the polypus, and others of a similar nature. The last have the head between the feet and the belly, and all of them have eight feet: in the sæpia and the loligo two of these feet are very long and rough, and by means of these they lift the food to their mouths, and attach themselves to places in the sea, as though with an anchor; the others act as so many arms, by means of which they seize their prey. The loligo is also able to dart above the surface of the water, and the scallop does the same, like an arrow as it were. In the sæpia, the male is parti-colored, blacker than the female, and more courageous. If the female is struck with a fish-spear, the male comes to her aid; but the female, the instant the male is struck, takes to flight. Both of them, as soon as they find themselves in danger of being caught, discharge a kind of ink, and thus darkening the water, take to flight.