Here they are again, because I like overthinking things.
Sea leopard!Baze w/ details below. Basically either you get high-pressure H20 in your face (like a shotgun shot) w/ nematocysts in them, or a LOT of numbing pinprick shots. A lil symbiotic colony of jellies lives inside his conch armor, and he constantly tries to ‘add’ more varieties.
Striped dolphin!Chirrut as well. In the absence of dolphin ‘melons’, I gave him receptors instead. Everything else about him is pretty dolphin though (heh).
They both have lungs and gills (gills where ribs are, lungs lower in the body)