Noun
lusca
A folkloric sea monster of the Caribbean resembling a giant octopus/squid, or giant cuttlefish; or shark-headed cephalopod-tentacle armed creature (sharktopus).
Bahamian locals swear by the existence of this sea creature called the Lusca, and they describe it as a cross between a predatory octopus and shark with a voracious appetite for anything that moves. Source: Internet