poriferologist

noun1

1. •
   (rare) A biologist whose specialty is the study of poriferans (sponges of the phylum Porifera).

   • Besides Dr. Nigrelli the party included Dr. Martin F. Stempien, Jr., of the Aquarium staff, Dr. Gustavo Pulitzer, a marine ecologist and poriferologist of Portofino, Italy — 1964