“Crabs, is it?” said Disco, rising and sauntering down to the sands; for he possessed an inquiring mind, with a special tendency to investigate the habits (pranks, as he called them) of the lower animals, which, in other circumstances, might have made him a naturalist.
Muttering to himself—he was fond of muttering to himself, it felt companionable,—“coorious, very coorious, quite ’stroanary,” he crept stealthily to the edge of the mangroves, and there discovered that the sands were literally alive with myriads of minute crabs, which were actively engaged—it was supposed by those who ought to know best—in gathering their food. The moment the tide ebbed from any part of the sands, out came these crablets in swarms, and set to work, busy as bees, ploughing up the sand, and sifting it, apparently for food, until the whole flat was rendered rough by their incessant labours. Approaching cautiously, Disco observed that each crab, as he went along sidewise, gathered a round bit of moist sand at his mouth, which was quickly brushed away by one of his claws, and replaced by another, and another, as fast as they could be brushed aside.
“Eatin’ sand they are!” muttered Disco in surprise; but presently the improbability of sand being very nutritious food, even for crabs, forced itself on him, and he muttered his conviction that they “was scrapin’ for wittles.”
Having watched the crabs a considerable time, and observed that they frequently interrupted their labours to dart suddenly into their holes and out again—for the purpose, he conjectured, of “havin’ a drop o’ summat to wet their whistles,”—Disco thrust the cutty into his vest pocket, and walked a little further out on the flat in the hope of discovering some new objects of interest. Nor was he disappointed. Besides finding that the pools left by the tide swarmed with varieties of little fish—many of them being “coorious,”—he was fortunate enough to witness a most surprising combat.
It happened thus:— Perceiving, a little to his right, some small creature hopping about on the sand near to a little pool, he turned aside to observe it more closely. On his drawing near, the creature jumped into the pool. Disco advanced to the edge, gazed intently into the water, and saw nothing except his own reflected image at the bottom. Presently
the creature reappeared. It was a small fish—a familiar fish, too—which he had known in the pools of his native land by the name of blenny. As the blenny appeared to wish to approach the edge of the pool, Disco retired, and, placing a hand on each knee, stooped, in order to make himself as small as possible. He failed, the diminution in his height being fully counterbalanced by the latitudinal extension of his elbows!
Presently the blenny put its head out of the water, and looked about. We speak advisedly. The blenny is altogether a singular, an exceptional fish. It can, and does, look sidewise, upwards and downwards, with its protruding eyes, as knowingly, and with as much vivacity, as if it were a human being. This power in a fish has something of the same awesome effect on an observer that might possibly result were a horse to raise its head and smile at him.
Seeing that the coast was clear, for Disco stood as motionless as a mangrove tree, blenny hopped upon the dry land. The African blenny is a sort of amphibious animal, living nearly as much out of the water as in it. Indeed its busiest time, we are told, (See Dr Livingstone’s Zambesi and its Tributaries, page 843.) is at low water, when, by means of its pectoral fins it crawls out on the sand and raises itself into something of a standing attitude, with its bright eyes keeping a sharp look-out for the light-coloured flies on which it feeds.
For several seconds Disco gazed at the fish, and the fish gazed around, even turning its head a little, as well as its eyes, on this side and on that. Presently a small fly, with that giddy heedlessness which characterises the race, alighted about two inches in front of blenny’s nose. Instantly the fish leaped that vast space, alighted with its underset mouth just over the fly, which immediately rose into it and was entombed.