There is another giant anemone (DISCOMA HADDONI) known to the blacks as "pootah-pootah," whose inner, reflexed, convoluted edges are covered with tentacles of brown with yellow terminals. This is friendly to fish--at any, rate to one species. It is the landlord or host of one of the prettiest fish of all the wide, wide sea, and seems proud of the company of its guest, and the fish is so dependent upon its host as to be quite helpless apart from it. The fish (AMPHIPRION PERCULA) "intel-intel" of the blacks, is said to be commensal (literally, dining at the same table with its host), as distinguished from the parasite, which lives on its host. The good-fellowship between the dainty fish--resplendent in carmine, with a broad collar, and waist-band of silvery lavender (or rather silver shot with lavender) and outlined with purple--and the great anemone is apparent. If the finger is presented to any part of the latter, it becomes adherent; or if the anemone is not in the mood for food, it curls and shrinks away with a repulsive demeanour. But the beautiful fish on the least alarm retires within the many folds of its host, entirely disappearing, presently to peep out again shyly at the intruder. It is almost as elusive as a sunbeam, and most difficult to catch, for if the anemone is disturbed it contracts its folds, and shrinks away, offering inviolable sanctuary. If the fish be disassociated from its host, it soon dies. It cannot live apart, though the anemone, as far as can be judged from outward appearances, endures the separation without a pang. However, it is safe to assert that the association between the stolid anemone and the painted fish--only an inch and a half long--is for their mutual welfare, the fish attracting microscopic food to its host. And why should one anemone greedily seize a fish, and another find pleasure in the companionship of one of the most beautiful and delicate of the tribe? This hospitable anemone occasionally takes another lodger--very frail and beautiful. All that is visible on casual inspection is an irregular smear of watery, translucent violet, flitting about in association with disjointed threads--stiff, erratic, and delicately white. There is no apparent connection between the spectral patch of colour and the animated threads, though they are in company. If, determined to investigate the mystery, the finger is presented, the colour evades it. It is conscious and abhors the touch of man. Follow it up in the pellucid water, and make of your hand a scoop, and you will find that you have captured, not a phantom but a prawn, compact of one bewildering blotch--and that is a word of doubtful propriety in connection with so elfin an organism--a mere shadow tinted the palest violet, and transparencies, with legs and antennae frail as silken threads. "Substance might be called what shadow seemed, For each seemed either."