Karamthulhu are a squid-like species that are sometimes obtained while fishing for slugs during the Rum Deal quest. They are also dropped by zombie pirates and zombie swabs.
Karamthulus can be used during Rum Deal in addition to sluglings to make unsanitary swill. After the quest, any Karamthulhus remaining in the inventory will disappear, and an attempt to fish for them triggers the response, "You have no need to do that any more."
For an exhaustive list of all known sources for this item, see here
- Karamthulhu is a portmanteau of karambwan and Cthulhu, a fictional squid god and character in many of H. P. Lovecraft's stories. Because of this, there are many ways to pronounce the "...thulhu" of Karamthulhu's name, such as (KLOO-loo). H.P. Lovecraft himself wrote many of the pronunciations, which seemed to vary from story to story. It wasn't until after his death that the pronunciation (K-THOO-loo) was popularised.