Mangrove Inhabitants

Too many to name, but you don't see them traded.

Lots of small crustaceans, particularly amphipods and isopods, live among the stones in the intertidal zone, and while they need to keep wet, they actively avoid becoming submerged. On the other hand, there are various clams and snails that become dormant when the tide exposes them, but come back to life when they're submerged. If the salinity was around 1/4 to 1/2 normal marine, you could easily keep some Malayan livebearing snails in a brackish water tank, and they'd stand in for these sorts of snails very effectively. At a higher salinity, you could probably experiment with some of the hardy marine species of turbo snail and chiton.

In terms of moving freely between land and water, among the most obvious examples are various types of snake and terrapin. Again, these aren't likely to be traded much, the exception being the diamondback terrapin, which is sometimes offered for sale. There is also mangrove frog, the only amphibian able to live in sea water, Rana cancrivora. I have no idea if this frog is traded.

Although they don't come out on land except to breed, the Asian horseshoe crabs, Carcinoscorpius and Tachypleus, are mangrove species in good standing and will do well in mid to high salinity brackish water systems if adapted carefully. They're quite commonly traded, though often as Limulus, which will itself do well in high salinity brackish water systems. Though tolerant of brackish water, horseshoe crabs are challenging animals to maintain in captivity for other reasons, and you'll need to read up on them before throwing them into the standard aquarium.

Cheers,

Neale

besides fiddler crabs and mudskippers, what other semi terrestrial brackish species are there?
 

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