A Year at the Shore

by Philip Henry Gosse

As a proof of the tenacity of life possessed by this species, a fisherman assured me that he once put a quantity in a bag into a cupboard and forgot them, till, after the lapse of a week, turning them out he found them alive.

THE SEA-CUCUMBER.

But now another object of interest claims attention: for, in this cavern, closely squeezed in between the layers of stone, I see the satiny-white skin of a glorious Sea-cucumber. And now to get him out, there’s the rub. So firmly imbedded is he, so deeply ensconced, that no pushing with fingers or sticks will avail; indeed, I can but just touch his body with my finger-ends poked in to the utmost. No; we must cut away the rock above and below with the strong steel chisel, by means of well-directed strokes of a heavy hammer. Slow work it is, for the rock is awfully hard: the prize, however, cannot escape, and the chief point of solicitude is not to crush it in the process. At length a fortunate blow splits off a slice of rock, which leaves the unhappy skulker defenceless. Now I get my fingers gradually behind him, and force him out, gently and tenderly; sucker after sucker he is compelled to let go, and now here he is in my hand, shrunken indeed, and squeezed flat from his very shrinking in the close crevice, but all unbroken and none the worse.

This is a much more sluggish creature than any of the mollusks that we have been capturing: no sooner are they put into water than they are active, and at once display their attractions; this animal, on the contrary, will be perhaps several days in your tank before he will feel himself sufficiently at home to unfold his splendid array of tentacles. But then it is indeed a magnificent coronet of plumes wherewith the headless king is adorned.

The Sea-cucumber soon finds himself a snug berth among the rock-work of the tank; pressing his body between the pieces just as when we saw him first, but taking care to leave space to protrude his front. Then this part evolves, and a deep collar of dark purple is seen, from which a ring of ten somewhat thick stems arises, tapering to a point and arching outwards. These are of a purplish-black hue, and are studded with short branches set on in a spiral, which again branch and branch again, each terminal point bearing a white papilla; so that the whole constitutes a series of conical aggregations of white dots clustering about the black stems, something like pointed cauliflowers, and forming, as they wave to and fro in the clear water, a very charming spectacle.[13]

Plate 3.
P. H. GOSSE, del. LEIGHTON, BROS.
DOTTED SIPONCLE. SEA-CUCUMBER.

The suckers, which, when the animal first came into our possession, were apparent only as little warts, arranged in five clustered rows down the angles of the body, are now seen to be long tubes, each with an adhering disk at its extremity, by which it anchors to the surrounding stones. The mechanism of these suckers does not importantly differ from that of the same organs in the Star-fishes. Indeed, notwithstanding the very wide diversity of form and appearance between the two animals, the Cucumber and the Star are so nearly allied as to belong to the same class, that named Echinodermata; the Sea-urchins, creatures totally diverse in aspect from both, connecting the forms together.

And this Cucumber, again, is connected with the proper worms (Annellida) by some obscure animals which bear the name of Siponcles. Here is one which may illustrate the form, the Dotted Siponcle.[14] It has a cylindrical body, rounded and abruptly pointed behind, which is of a light-brown hue, with a satiny gloss; but the hue resolves itself under a powerful lens into a freckling of pale dots, excessively numerous, on a brown ground, and the lustre into a multitude of close-set annular wrinkles. What is curious in the creature is the protrusion and retraction of its trunk. From the front end of the body we see rapidly protruding, by evolution of the parts, a rather slender trunk, till it attains about one-third the length of the body; then its tip expands, and is seen to be surrounded by eight rows of black points, and within these a circle of slender, white, thread-like tentacles. These latter are the representatives of the gorgeous head-plumes of the Cucumber. Immediately the long trunk is turned out to the outmost, it begins to be rolled in again; and this process goes on with equal rapidity till it is quite concealed. Then again it is unrolled, and so on alternately. Doubtless the function of respiration is performed by this action; and perhaps also food is collected and swallowed.