Fig. 1.—

Tissues and focal taxa. Comparison of the general morphology of the three focal species (A) A. sulcata, (B) H. crispa, and (C) M. griffithsi. Tentacle morphology varies considerably across these species with long fusiform tentacles (A. sulcata), short filiform tentacles (H. crispa), and broad and highly branching tentacles with acrospheres (M. griffithsi). Unlike the many species of sea anemone that have their column exposed, our focal taxa have their column protected to some degree by either tentacles (A. sulcata), a broad oral disk (H. crispa), or buried in the sediment (M. griffithsi).