Tiny Marine Organism, Mr. Krabs' Nemesis
This page is the CodyCross answer for the clue below from Small World, Group 689, Puzzle 1 (Thumbnail Images).
Question is: Tiny Marine Organism, Mr. Krabs' Nemesis
and the answer is: PLANKTON
Word Meaning:
PLANKTON — (uncountable) Organisms, especially small and microscopic ones, that drift in water.
Definitions from Wiktionary.