名詞 nekton:

1. the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales

nek.ton

n.（名詞）
The collection of marine and freshwater organisms that can swim freely and are generally independent of currents, ranging in size from microscopic organisms to whales.
自泳生物：能自由游動且不依靠水流的海中和淡水生物的總稱，包括微生物乃至鯨魚

來源：
Greek nôkton [neuter of] nôktos [swimming]
希臘語 nôkton [] nôktos的中性 [游動著]
from nôkhein [to swim] * see sn3-
源自 nôkhein [游動] *參見 sn3-

【引伸】
nekton.ic