I used to live in an estuary so I have seen a lot of the BW species in real life. There were fiddler crabs, (Uca minax), blue crabs, some kind of horseshoe crabs, various types of rays, etc. I was wondering if these could be kept in captivity in a brackish aquarium or would it need too much room? Fiddler crabs I remember needed the tides to feed and burrow so wouldn't that be necessary to reproduce in brackish water?