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.

This list is incomplete; you can help by adding missing items. (February 2011)

Arthropods

Crustaceans

Fiddler Crab, Uca pugnax[1]
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[2]

Cephalopods[3]

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 [4]
  • Panama brief squid or Panama thumbstall squid, Lolliguncula panamensis

References