Photo of Animalia: species: Astrea curta (Lizard Island Field Guide)

Close-up of Astrea curta at Yonge Reef near Lizard Island. Note circular corallites, alternating long and short septa, and some beading on the septa.

© Anne Hoggett

Identified by Grace Frank who notes: "Alternating long and short septa are typical of curta, as well as circular corallites and some small beading on the septa."