You have fiberglass underneath the carpet. It is probably glued on, and
will be a mess to pull up.

Not on the Capri series. He has a plywood floor. (Unless Bayliner downgraded
the floor between 1999 and 2003) The Ciera series and above have FRP
floorboards.

Carpets are frequently snapped in, rather than glued down, over fiberglass.