Yes, FLOATERS is a Scrabble word!

Letter values in Scrabble US: F 4, L 1, O 1, A 1, T 1, E 1, R 1, S 1.

Is it a valid word?

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

spots before the eyes caused by opaque cell fragments in the vitreous humor and lens
a debt instrument with a variable interest rate tied to some other interest rate (e.g. the rate paid by T-bills)
a wanderer who has no established residence or visible means of support
an employee who is reassigned from job to job as needed
a voter who votes illegally at different polling places in the same election
a swimmer who floats in the water
an object that floats or is capable of floating
an insurance policy covering loss of movable property (e.g. jewelry) regardless of its location

Also: musca volitans, muscae volitantes, floating policy.