Seahorse mounts

Seahorse mounts are aquatic mounts in World of Warcraft.

Drop

 * Reins of Poseidus drops from Poseidus in Shimmering Expanse and the Abyssal Depths.

Quest

 * Vashj'ir Seahorse is a quest reward from The Abyssal Ride.

Vendor

 * Crimson Tidestallion is sold by Mrrl in Nazjatar.
 * Inkscale Deepseeker is sold by Crafticus Mindbender or  Dazzerian in Nazjatar.
 * Saltwater Seahorse is bought for from vendors in Boralus and Zuldazar.

Achievement

 * Fabious (mount) is rewarded from taking a S.E.L.F.I.E. picture with Fabious in Nazjatar.