Stylactaria hooperii (Sigerfoos, 1899)

Synonyms in the area: Stylactis hooperi —Moreira et al. 1979 [polyp and medusa] [incorrect subsequent spelling]. Distribution in South America: polyp—Atlantic Ocean, Brazil, from 23.30°S to 24°S (Moreira et al. 1979; Migotto 1996; Migotto et al. 2002; Shimabukuro 2007; Miranda et al. 2015); medusa—Atlantic Ocean, Brazil, at 23.81°S 45.41°W, at 23.83°S 45.42°W (Moreira et al. 1979; Migotto 1996; Migotto et al. 2002; Silveira & Morandini 2011).

Habitat: polyp—from 2 to 6m depth, on barnacles, hermit-crabs, and gastropods (Moreira et al. 1979; Migotto 1996; Shimabukuro 2007).