The Problem with Tentacles is a Starbound codex entry about the Human race, and so far is only available upon the creation of an Human character.
Codex Entry[]
So, turns out little tentacle monsters are just as murderous and deadly as the huge one. Who knew? Should've settled for a kitten after all. Anyway, the rest of the crew is dead, which sucks, but no point dwelling on it.
Guess I'd better keep looking for a decent planet, then. One without tentacles. Or killer plant people. Or giant spiders. Or taxes. Yeah, it's time for mankind to claim the stars!