underwater forts?

[Norfleet]

Labs and temples can be built underwater by all races.

Forts cannot be built by land races underwater. The spell "living castle" allows a land race to magically create a castle in a remote water province.

Forts built by water races on land will be of a different type than their water fort. IIRC, a Kelp Fort becomes a Mausoleum when built on land. I forget what the Kelp Citadel turns into, and the Dark Citadel remains the same.