Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
In this slow and suspenseless grade D horror film, a sailor from the U. S. Navy sumbarine Fer de Lance is on shore leave in Tierra del Fuego, South America. (Although the people in the market are wearing clothing worn but people high up in the Andes.) He's shopping in an outdoor market with a gum-smacking Indian girl when he asks an old man with a snake tattoo on his cheek about a snake he has in a basket. He says it's a "Terciopelo." The girl sas a terciopelo "is poison" and that it's name is Fer de Lance. The sailor insists on buying the snake because it's the same name as his ship. The old man won't sell him the snake but offers him a bunch of young ones (really a bunch of baby boa constrictors) which he takes back to the submarine. A crewmember insists that he get rid of them, but of course they escape. You knew they would. If they didn't, this movie would be even duller than it is, and that's hardly possible. Before long people are dead, the ship sinks, and the entire submarine is terrorized by a few harmless and cute little baby snakes you can buy at any pet store, um, I mean by the nest of evil deadly Fer de Lance vipers.