Dolphins, turtles and tropical fish
Dolphins are neutral and lead you to treasure if you feed them fish. Turtles lay eggs on beaches, and baby turtles drop Turtle Scutes when they grow up.

Released on 18 July 2018, Minecraft Java Edition 1.13 Update Aquatic fills the oceans with coral reefs, shipwrecks, ocean ruins and icebergs, and adds dolphins, turtles, tropical fish, the Drowned and the Phantom. It also brings the Trident, the Conduit, swimming, waterlogged blocks and data packs.
The changes you will notice first, with the pages that go deeper.
Dolphins are neutral and lead you to treasure if you feed them fish. Turtles lay eggs on beaches, and baby turtles drop Turtle Scutes when they grow up.
The Drowned live in oceans and rivers, and Zombies that stay underwater too long turn into them. Phantoms swoop at players who skip sleep and drop Phantom Membrane, which repairs Elytra.
The Trident is a melee and ranged weapon. A Heart of the Sea from buried treasure and 8 Nautilus Shells craft the Conduit, which makes life underwater easier.
Coral, Coral Blocks and Coral Fans grow in reefs with Kelp, Seagrass and Sea Pickles. Blue Ice comes from icebergs, and Magma Blocks or Soul Sand create Bubble Columns.
Published by Mojang on the official Minecraft YouTube channel.
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Mods must be rebuilt for each version. Counts from the files published on Modrinth and CurseForge, in our catalog.
8 mods in our catalog have a 1.13 file →70 texture packs and 29 maps in our catalog support 1.13.
Open the Minecraft Launcher and select Minecraft: Java Edition.
Go to Installations, create a new installation and choose version 1.13.
Back up your worlds before opening them in a new version.
42 snapshots, 10 pre-releases and 0 release candidates over 266 days.
On 18 July 2018, for Java Edition. Two bug-fix releases followed: 1.13.1 on 22 August 2018 and 1.13.2 on 22 October 2018.
Defeat the Drowned, the hostile mob of oceans and rivers. Tridents drop from them, and some Drowned spawn holding one.
A hostile flying mob that the community voted into the game in 2017. It attacks players who have not slept, and its Phantom Membrane repairs Elytra and brews the Potion of Slow Falling.
Worlds, yes: the Optimize World button upgrades a whole older world at once, so back it up first. Mods, no: a mod only loads on the version it was built for, so 1.12 mods need a 1.13 build.