Squid

Squid are 8-armed mobs that spawn in water. Squid are always passive towards the player, akin to the other passive mobs found on land. They can be found in water from levels greater than 45 and lower than 63, and they can spawn in any biome or difficulty.

Appearance
Squid have 8 tentacles, blueish-teal skin and teeth that can be found underneath the head. They have two eyes which appear wall-eyed. Despite being called squid in-game, their body arrangement is closer to that of a real-world octopus.

Spawning
Squid spawn in water between layers 46 and 62.

Drops
When killed, each squid will drop 1 - 3 ink sacs.

Behavior
When moving about, the squid's tentacles open and close, giving them an appearance of pushing themselves forward. Squid will hover in place and wander around one layer aimlessly, are not attracted to light and do not deliberately interact with the player. However, if attacked, squid will attempt to swim away from the player.

Squid suffocate in air or if in water that is too shallow for their liking, meaning you can find natural ink at the edges of ponds. They can take fall damage and burn like any land mob, but, due to being aquatic they cannot drown.

Squid cannot swim in lava, even if given a Fire Resistance potion. They simply pass through the lava and behave as if on land.

Squid (unlike land-based mobs) can swim against a current and not get pushed by it.

Trivia

 * Hitting a squid underwater causes them to rise approximately 1/3 to 1/2 a block.
 * Squid cannot be damaged by attacking their tentacles.
 * When out of water, squid are extremely resistant to knockback.
 * Squid behave like some land mobs and attempt to ride a minecart, however this is not always useful as rails and water cannot occupy the same block.
 * Squid are the first passive mob that spawn at any light level, in water, and without grass.
 * When the world is loaded, all squids are aligned with the tentacles facing east.
 * Squid are one of the few silent mobs in Minecraft, along with Witches and Snow Golems.
 * In RC2, when Squid came out of the water and were hurt, they made the new player hurt sounds.
 * Squid and bats are the only passive animals that cannot breed; due to this, however, they will spawn randomly (similar to hostile mobs).
 * Squid, along with ocelots and bats are the only passive mobs that can despawn.