Deadglim was the male sea rat bosun for the Darkqueen under the command of Captain Greypatch. He was a matey of Frink. Deadglim's favored weapon was a scimitar and he often acted as a scout sent in reconnaissance in new regions.
Deadglim was one the first sea rats of the Darkqueen to encounter the fierce trident-wielding toads from Toadlands. He was sent by Greypatch to patrol the Mossflower Woods when the sea rats first arrived in the region and captured Pakatugg Treefleet. He also participated in the siege against Redwall Abbey, using fire-swingers to set the Abbey on fire. Deadglim lost his left ear in the battle with the Long Patrol. Deadglim was presumably killed by the Flitchaye as he and his party tried to flee the Mossflower region.