That's "founder," Mate. "Flounder" is a mild-tasting whitefish.
Afraid not, both are correct:
floun·der 1 (floundr)
intr.v. floun·dered, floun·der·ing, floun·ders
1. To make clumsy attempts to move or regain one's balance.
2. To move or act clumsily and in confusion. See Synonyms at blunder. See Usage Note at founder1.
n.
The act of floundering.
[Probably alteration of founder.]
floun·der 2 (floundr)
n. pl. flounder or floun·ders
Any of various marine flatfishes of the families Bothidae and Pleuronectidae, which include important food fishes.
[Middle English, from Anglo-Norman floundre, of Scandinavian origin; see plat- in Indo-European roots.]
