The Aquatic Emblem is a Hardmode, Expert Mode-exclusive accessory obtained from the Treasure Bag dropped by Aquatic Scourge. It allows the player to breathe underwater and prevents most ocean enemies from doing damage while providing a defense boost underwater and slowing the player down. The defense boost and movement speed reduction will slowly increase and cap out at 30 and 5% respectively. The boosts persist outside of water but will slowly vanish. Also increases player light levels by +1, +10 to breath loss delay and -25% breath loss rate while in the Abyss.
- It can be considered the upgrade to the Ocean Crest, as it includes all of its effects while also adding a defense boost.
- The Aquatic Emblem causes Pink Jellyfish, Sharks, Crabs, Sea Snails, and Squids to become friendly. It does not affect any Calamity ocean enemies.
- It takes roughly 83 seconds of being submerged to fully power up to its max defense boost and speed reduction.
- In the Abyss, equipping it will only slow the speed at which breath is lost, rather than stop it from draining entirely.