It is different. There are mermaids and mermen, yes. Choose fish you want to be your, eh... type? Suppose you could say. Mermaid form changes to match. There are some main clans, like sirens and selkies, and ones in coral reefs. Have special magic they teach to those going on their journeys. From there, clans break off. There are many, but there are those, eh... main ones?

[Like a hierarchy. Some main "big" tribes and a bunch of smaller ones.]

But we are all mermaids and mermen. I do not know what the fishmen and like are like. Suppose it is very different. I would be interested in knowing more. [She trails off, looking a little wistful. She misses the sea and mermaids and sea creatures and uugghh. She hopes sometime their next stop in this group is being dumped in one]