Underwater walking

Underwater walking is a movement mechanism originally introduced in Cataclysm that allows the character to function as if he/she is on land when standing or walking on the seafloor. This includes water breathing, the ability to eat or drink while on the seafloor, the ability to mount on the seafloor, and increased movement speed while not mounted and walking on the seafloor.

Items

•  [Barnacle-Encrusted Gem] is a rare Class Hall mission reward that turns the player into a Makrura for 10 minutes and allows underwater walking.
•  [Damaged Diving Helmet] is available during the Luminous Luminaries event from Max Megablast.

Zones with Underwater Walking

• Vashj'ir: Obtained after completing the quest  [30-35] Sea Legs. This manifests as a buff named [Sea Legs] that is active as long as the player is in Vashj'ir and its three zones (of Kelp'thar Forest, the Shimmering Expanse and the Abyssal Depths). Quests which are not part of Vasj'ir's quests yet require you to visit the zone usually provide a similar buff around their area of interest for players who did not obtain the buff from questing in the zone.
• Thousand Needles: Similar to the Vashj'ir example, accepting the quest  [15-30] Down in the Deeps will provide the [Speedbarge Diving Helm] buff that is active whenever underwater in this zone.
• Swamp of Sorrows:  [Silversnap Swim Tonic] is provided for the quest  [15-30] Maliciously Delicious, which gives the imbiber underwater walking for 15 minutes as long as the character stays in Swamp of Sorrows.
• Dread Wastes: Drinking  [Potion of Mazu's Breath] during the quest  [30-35] Mazu's Breath grants the Mazu's Breath buff which allows underwater walking in Shelf of Mazu and Lonesome Cove. Additionally, Enchanted Essence is a zone buff that allows underwater walking in Gokk'lok's Grotto.
• Val'sharah:  [45WQ] Buoy Fishing grants Luraura's Gift that allows underwater walking in Val'sharah for 10 minutes.
• Suramar: Completing the quest  [45] Fisherman's Tonic grants the buff Draught of Seawalking which allows underwater walking in Azuregale Bay.
• Tiragarde Sound: Accepting the quest  [10-60] A Cure from the Sea grants the Favor of the Sea buff, which allows underwater walking in Anglepoint Wharf and Krakenbane Cove.
• Nazmir:  [River Clam Pearl] can be collected from River Clams and provides underwater walking in Nazmir for 5 minutes on use.
• Nazjatar:  [50] Most Delicious Clams provides  [Rift Diver] which grants underwater walking for 8 minutes on use.
• There are several underwater Tortollan bars across Kul Tiras and Zandalar that provide underwater walking in their premise.