The genus name Aaata has been described as a synonym to two species in the Microcionidae family of sea sponges (Demospongiae). The two species being:
The above are synonyms for Clathria brepha and Clathria spongigartina respectively (de Laubenfels, 1930). The two later names are now the currently accepted definitions for the species.
References
Aaata (sponge) Wikipedia(Text) CC BY-SA