About Actinostephanus haeckeli Kwietniewski, 1897
Actinostephanus haeckeli measures 10 to 12 centimeters in diameter. It has 12 long, cylindrical tentacles that are uniformly dark brown and taper toward their tips. The species' body column is short and smooth, covered in regular stripes that grow paler closer to the base. Actinostephanus haeckeli mainly lives on sandy bottoms, in lagoons, and in bays. It can retreat completely into the sand in the sandy low-tide areas that it primarily inhabits.
