A hellgrammite is the larval stage of a dobsonfly and, because the insect spends almost half its life in that stage, it's a favorite forage of fish. Panfish and trout are especially fond of this bait. Gulp! scent attractant teams with an irresistible texture to create a taste and feel combination fish can’t resist. Per 12. Size: 1-1/2". Colors: (001)Black, (003)Black Olive, (005)Natural.