Answer: plankton

AnswerCrossword Clue
PLANKTONKrill and its kin
PLANKTONFood for whales
PLANKTONFloating organic life.
PLANKTONFloating food for fish.
PLANKTONFish food
PLANKTONBoard weight?
PLANKTONSea food
PLANKTONWhale shark's meal
PLANKTONFish's food
PLANKTONFloating organism in the sea
planktonmicroscopic organisms floating in water
planktonthe minute animal and plant life of a body of water