Underwater
This weapon works as well in water as it does on land. Attacks with the weapon don't take the normal penalties and restrictions for being used in water or underwater. If the weapon is capable of dealing fire damage, its fire functions underwater as well.
Traits
Something with the magical trait is imbued with magical energies not tied to a specific tradition of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
Effects with the water trait either manipulate or conjure water. Those that manipulate water have no effect in an area without water. Creatures with this trait consist primarily of water or have a connection to magical water.