Yes, BOWFINS is a Scrabble word!

Letter values in Scrabble US: B 3, O 1, W 4, F 4, I 1, N 1, S 1.

Is it a valid word?

BOWFINS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America

Also: amia calva.

Not playable in Scrabble US: GRINDLE.