Nematostella glauca has a petite pedal disc. The actinopharynx is well-developed with faint siphonoglyphs. Mesenteries are paired, totaling 6+6+12+48, and the last cycle is situated in the highest section of the body. The uppermost part of the actinopharynx contains complete mesenteries of the second and third order, with mesenteries of the first three cycles being perfect.