This is a list of various species of invertebrates, animals without a backbone, that are commonly found in brackish aquariums kept by hobby aquarists. Some species are intentionally collected for their desirable aesthetic characteristics. Others are kept to serve a functional role such as consuming algae in the aquarium. Some species are present only incidentally or are pest species.
Arthropods
Crustaceans Fiddler Crab, Uca pugnax Perisesarma bidens, Red Clawed Crab Amano Shrimp/Yamato Shrimp, Caridina multidentata Grass Shrimp/Glass Shrimp, Palaemonetes paludosus Blue Crab, Callinectes sapidus
Mollusca
Gastropods Olive Nerite, Vittina usnea
Cephalopods Source: Lolliguncula is the only genus of cephalopods that is known to exist in brackish water. They can tolerate as low as 8.5 PPM of salt.
Subgenus Loliopsis Dart squid, Lolliguncula diomedea Subgenus Lolliguncula Argus brief squid or Argus thumbstall squid, Lolliguncula argus Atlantic brief squid or Atlantic thumbstall squid, Lolliguncula brevis Panama brief squid or Panama thumbstall squid, Lolliguncula panamensis
References
