Figure 10.26
Deep-diving organisms. (A) The strange-looking ocean sunfish (Mola mola) lives at the ocean surface and dives about 200 m (660 ft) deep to eat jellyfish. Note the GPS data recorder tag just behind the top fin of the fish. (B) Sperm whales (Physeter macrocephalus) dive as deep as 3,000 m (10,000 ft)—three vertical kilometers straight down—to feed on giant squid. Like dolphins and bats, they locate their prey in the dark using sound, or echolocation.(A. © Mike Johnson; B. © Jens Kuhfs/Photographers Choice/Getty Images)