Pluto Bluefin
Captain of the Bluefin Expedition. A bluefish trevally fishman archaeologist.
Haros
Charon's older brother, a tiger shark fishman. A historian.
Hel
The Bluefin Expedition's ecologist and cook. A leafy sea dragon fishwoman.
Izanami
A white spot tetra fishwoman and anthropologist.
Anubi
A marble angelfish mermaid. Linguist and philologist.
Somnu
The Bluefin Expedition's navigator and engineer. An electric ray merman.