By 2pm PT/5pm ET today, the latest ARK: Survival Evolved update for PlayStation 4 and Xbox One should be available to download, Studio Wildcard has revealed. It was previously scheduled for April 24, but took a couple of days to pass certification.
Version 506 on PS4, and v753 on Xbox One, here’s the full list of patch notes for today’s update:
New Content

New Mechanic: Aquatic & Amphibious Creature Breeding
New Dino: Equus!
New Dino: Leedsichthys!
New Dino: Ichthyornis!
New Dino: Iguanodon!
New Structures & Mechanic: Tek Underwater Bases
New Structure: TEK Teleporter
New Structure: TEK Mosa Saddle
New Structure: Tek Power Generator
New creature sounds for: Dodo, Raptor, Quetzal, Parasaur, Rex, Trike, Pteranodon, Dilo, Direwolf, Compy, Dung Beetle, Argent, Pachy, and Mammoth. New female/male character sounds, inventory sounds, building sounds, crafting sounds, and a couple items/weapons.
20+ new Explorer Notes
1 New Hairstyle and 1 New Facial hairstyle (male and female variants)

General

Total Inventory Menu redesign (other UI’s coming soon!)
Flyer Nerf
Ridable fliers (not the Moth) now have ground attacks.
Limited one C4 attached per dino
Sheep now have a “Slaughter” option when you have a club, sword, hatchet etc equipped, also works on PvE
Player invulnerability after Eel attack increased to 5 seconds.
Scuba tanks now provide oxygen underwater even when a player is offline.
Underwater mines now respect enemy foundation radius....