It looks like a Slime with a Shellmet permanently stuck on its head, and is often encountered when sailing. Though not as common as their land-lubbing cousins, the Seaslimes are infamous for boasting high defence and elemental resistances, as well as turning tail when battles look bleak, not unlike the Metal slime family.
Seaslime appears as a C-rank monster of the Slime family as part of the 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.
{{DQTactEnemy
|name=Seaslime
|kanji=マリンスライム
|romanji=Marin suraimu
|sprite=
|family= Slime
|rank=
|role= Magic
|lvl=105
|hp=382
|mp=262
|move=2
|attack=206
|defense=385
|agility=160
|wisdom=238
|weight=20
|bskill1=Crack
|bskill2=Kabuff*
|bskill3=N/a
|askill1=Crack-type Spell Potency +5% / Stats Up
|askill2=Crack Res +25 / Stats Up
|askill3=Crack Potency +5% / Stats Up
|askill4=Bang Res +25 / Stats Up
|askill5=Crack Potency +5% / Stats Up
|lperk1=N/a
|bperk1=WIS +3
|bperk2=Crack Potency +2%
|bperk3=N/a
|aperk1=Crack-type Spell Potency +5%: Increases Crack-type spell potency by 5%.
|frizz-resist=Normal
|sizz-resist=Normal
|crack-resist=Half Res
|woosh-resist=Very Weak
|bang-resist=Half Res
|zap-resist=Very Weak
|zam-resist=Normal
|snooze-resist=Super Weak
|poison-resist=Normal
|physical-seal-resist=Normal
|spell-seal-resist=Super Weak
|martial-seal-resist=Normal
|breath-seal-resist=Normal
|hobble-resist=Normal
|stun-resist=Normal
|blind-resist=Immune
|curse-resist=Half Res
|paralysis-resist=Normal
|confusion-resist=Normal
|charm-resist=Half Res
|family=
|role=
