Feeding on these diatoms are countless thousands of small shrimps (_Euphausia_); they can be seen swimming at the edge of every floe and washing about on the overturned pieces.

In turn they afford food for creatures great and small: the crab-eater or white seal, the penguins, the Antarctic and snowy petrel, and an unknown number of fish.
These fish must be plentiful, as shown by our capture of one on an overturned floe and the report of several seen two days ago by some men leaning over the counter of the ship.

These all exclaimed together, and on inquiry all agreed that they had seen half a dozen or more a foot or so in length swimming away under a floe.

Seals and penguins capture these fish, as also, doubtless, the skuas and the petrels.
Coming to the larger mammals, one occasionally sees the long lithe sea leopard, formidably armed with ferocious teeth and doubtless containing a penguin or two and perhaps a young crab-eating seal.

The killer whale (_Orca gladiator_), unappeasably voracious, devouring or attempting to devour every smaller animal, is less common in the pack but numerous on the coasts.