Uninvited (1988) DVD
Be careful who you invite aboard your yacht. That's what a band of criminals and their cohorts discover when a seemingly harmless felinejoins themfor a cruise. What these passengers don't know is thecat is an escapee from a research lab, created to transform into a hideous mutant creature at a moment's notice. Once out on the high seas, the beast reveals itself leading to a bloody showdown and terrifying climax.