Yes, SCYPHOZOAN is a Scrabble word!

Letter values in Scrabble US: S 1, C 3, Y 4, P 3, H 4, O 1, Z 10, O 1, A 1, N 1.

Is it a valid word?

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

any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle