Isla De Chupacabra
A team-building exercise goes horribly awry when the crew of Sealab finds themselves on the dreaded "Isla de Las Chupacabras!" In English, that's "Island of the Goatsuckers." And the episode is in English. Except in Cartoon Network's Latin American markets, where it's probably dubbed in Spanish. But whatever.
Enter the sinister and mysterious world of the Neptunati, a secret organization that holds the fate of the world in its clutches. And which also, for some reason, has Shanks as a member. Drink deeply of the real human blood from that real human skull, Neophyte! Yeah, wolf it! Wait, you got some on your chin, dummy.