Triton's ConchEquipment 9
Source Pathfinder Core Rulebook
Price 640 gp
Weight light
If you put this large opalescent conch shell to your ear, you can hear the sound of the roaring sea crashing against the shore.
Activate 
Interact (auditory)
Effect You can raise the conch to your lips and blow into it, letting out a long, rumbling note. For the next minute, you and all allies who were within 30 feet of you when you activated the conch gain a +2 item bonus to Athletics checks to Swim and can breathe under water.
Effect: Triton's Conch
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school 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.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.