浮游生物

plankton

to be born / to give birth / life / to grow / raw / uncooked / student

thing / object / matter / abbr. for physics 物理

organism / living creature / life form / biological / CL:個|个[ge4]

surname You

to swim / variant of 遊|游[you2]

to walk / to tour / to roam / to travel

to float / superficial / floating / unstable / movable / provisional / temporary / transient / impetuous / hollow / inflated / to exceed / superfluous / excessive / surplus

to float / to drift / to wander / variant of 蜉蝣[fu2 you2]