Minecraft wiki entry for Drowned, associated text: Three drowned mobs that spawned naturally in an ocean biome.
A drowned swimming in a river in Bedrock Edition.
A group of drowned attacking the player.
Drowned within a coral reef.
A drowned killing a pufferfish after being attacked by it.
A drowned holding both a trident and a nautilus shell.
A drowned wearing armor. This occurs only on drowned zombies, not naturally spawned drowned.‌[Java Edition only]
Same posture as a player's, when holding a nautilus shell or anything else in their offhand.‌[Bedrock Edition only]
A drowned chicken jockey.
An unreleased drowned texture.
A large mix of zombies, skeletons, creepers, spiders, salmon and drowned in a custom superflat river biome in Education Edition.
A drowned with a fishing rod.
A drowned riding a minecart, carrying an enchanted trident.
Drowned holding a trident the wrong way.
Drowned wearing a pumpkin on Halloween.
Drowned can sometimes spawn in Ocean Ruins in positions that they can't get out of.