Thalassianthidae is a family of sea anemones that contains the genera Actineria, Cryptodendrum, Heterodactyla, and Thalassianthus.

[2] Research has shown that three species of sea anemones belonging to the family Thalassianthidae - (Cryptodendrum adhaesivum, Heterodactyla hemprichii and Thalassianthus aster) - contain type 2 sodium channel peptide toxins capable of causing lethality to freshwater crabs.

[3] In addition, high molecular weight toxins appear to be a new type of toxin in the Thalassianthidae family of sea anemones.

[3] This information has not been found on any other scientific paper up to this point in time.

Heterodactyla hemprichii is a species of sea anemone in the family Thalassianthidae This sea anemone does not host any varieties of clownfish.