Species: A. equina
Maximum Size: 2" across
Temperature: 64-68 F
Hardness: 15-25 dH
Brackish Tolerance: 1.015-1.025
Minimum Tank Size: 5 gallons
Feeding: Mysis Shrimp, brine shrimp, krill, chopped shellfish
Notes: Unlike the majority of Anemones and Cnidarians available in the marine trade, the Beadlet Anemone is very tolerant of salinities outside of full strength seawater (1.023-1.025) and is often found in estuaries. Also unlike most other Anemones, the Beadlet Anemone is not photosynthetic and derives all nutrition from purposeful feeding, which should be done weekly. They are also tolerant of subtropical conditions, but do not grow to their full size in these conditions. The Beadlet Anemone is the only Anemone species to perform viviparious reproduction, and purchasing a few specimens will allow for them to breed in the home aquarium.
Although not aggressive, they do sting and thus should not be kept with fish that are unable to avoid swimming into them. Few brackish, coldwater fish exist that fit this profile and are available in the trade. One is the Peacock Blenny (Salaria pavo) that is occasionally sold. All things considered, the Beadlet Anemone probably should not be kept with fish in brackish systems.
FAQs on Cool to Cold Water Anemones, Wetwebmedia
Actinia equina, Animal Diversity Web