8 The Water Column: Nekton. Notes for Marine Biology: Function, Biodiversity, Ecology By Jeffrey S. Levinton. ©Jeffrey S. Levinton 2001. Nekton: Definitions. Nekton: organisms living in the water column that can swim strongly enough to move counter to modest water currents.
Notes for Marine Biology: Function, Biodiversity, Ecology
By Jeffrey S. Levinton
©Jeffrey S. Levinton 2001
Components of force during swimming
Rete mirabile: countercurrent
exchange to retain oxygen
Vulmer, the crushing
X ray of bivalves in fish gut
A shell-crushing fish, sculpin Asemichthys taylori
Pacific Northwest U. S. A.
Opening of large mouth to consume prey
Cetaceans: whales and porpoises
Pinnipeds: seals, sea lions, walruses
Mustelids: sea otters
Sirenians: sea cows, dugongs