The Undine Isles is a series of epic science-fantasy novels about a community of negligibly senescent mermaids. Most of them are dykes. The main series consists of 4 planned novels, and the prequel series called Arrival Songs (currently being written simultaneously alongside the last 2 Undine Isles books) will consist of 12. I think it probably sounds way more ambitious than it is.
Please check out excerpts and drawings on this site as they are posted! Excerpts are coming after I finish the current edit!
Featured image (right): Ottavia (2020)