Abilities: Str 32, Dex 9, Con 17, Int 18, Wis 19, Cha 18 ?
i expect the physical stats will change when in humanoid form.
"It can appear as a human, tortle, lupin, etc., acting the role of a recluse happy to have visitors."
"While in humanoid form, the sea hermit possesses the natural AC of that form. If attacked, the creature will shapechange back to its natural state during the first round of combat."
"The sea hermit's big advantage is its shapechanging ability. This ability functions like the 9th-level wizard spell shapechange, except that it is a natural ability. The sea hermit can imitate only intelligent creatures which it has studied.(The few sages who know of the sea hermit and araneas have tried to find a link between their abilities. This has been unsuccessful because the sea hermit's ability is far more advanced, as it can quickly assume the form of any intelligent creature, not just a single humanoid.) It requires one round to change shape, after which the creature possesses full natural, nonmagical abilities."
MCA4:
"The sea hermit's big advantage is its shapechanging ability. This ability functions like the 9th-level wizard spell shapechange, except that it is a natural ability. The sea hermit can imitate only intelligent creatures that it has studied. It requires one round to change shape, after which the sea hermit possesses full the natural, nonmagical abilities of the form assumed."