Seaslimes are blue slimes that carry around a spiked seashell for protection and are typically encountered on coastal regions and at sea. Though not as common as their land-faring cousins, the seaslimes are infamous for boasting high defence and elemental resistances, as well as turning tail when battles look bleak. They also have a tendency to retreat into their shells to protect themselves. In the Nintendo DS remake of Dragon Quest VI, a seaslime named Shelley can join the Hero and party as a slime buddy.
Seaslime appeared from the beginning of the game. In this game, they are part of the Aquatic family rather than slimes. Like always, they flee when threatened and are able to cast Kabuff. When they become enraged, they hunker down inside their shells to protect themselves and can cast Crackle.
Seaslime appears as a C-rank monster of the Slime family as part of the original Dragon Quest III event. It can be recruited from Chapter 2, Episode 1: A Ship Voyage and Chapter 3, Episode 1: Another Ship Voyage of the event quests at any difficulty, as well as Chapter 16, Episode 6: Sightseeing at Port Town of the main storyline. The seaslime can participate in the Armful, King kelp, and Blindfolded hammerhood's Battle Roads as a party member.