Jellyfish

Jellyfish are small aquatic mobs that poison the player when touched.

Spawning
Jellyfish spawn in ocean, deep ocean, frozen ocean, river and frozen river biomes.

Appearance
Jellyfish spawn with one of five different colors: light orange, purple-grey, light blue, green, and orange-red. There are also seven other colors, but jellyfish with these colors do not spawn naturally, and cannot be spawned with the jellyfish spawn egg. These include blue, orange-yellow, pale pink, pinkish-purple, speckled blue, and white.

Drops
Jellyfish will drop 0–2 slimeballs upon death. This can be increased with the Looting enchantment. They drop 1–3 experience when killed by a player or tamed wolf.

Behavior
Jellyfish are passive mobs, and will not attack or chase after you. They are translucent, and move in a pulsating manner. They are also luminescent at night. It takes about 6 seconds before jellyfish take damage when exposed to land.

If the player gets too close to a jellyfish, they will be inflicted with the Poison I effect for five seconds on Easy or higher difficulty. This does not, however, apply to tamed jellyfish.

Taming
A jellyfish can be tamed by a fish net on it and then releasing it again. When a jellyfish has been released from a fish net, the naming screen will appear. A tamed jellyfish cannot be healed by 'feeding' it with food items, they can only be healed with a splash potion of Healing. Tamed jellyfish will not poison the player when touched.

History
{| class="wikitable sortable" style="width: 50%;" !Version

v12.0.4
- Temporarily disabled jellyfish glowing effect until player transparency is resolved.

v10.0.4
- Fixed jellyfish crashing bug.

v5.0.5
Jellyfish and stingrays will no longer poison players riding a boat.

v5.2.4
- Fixed GL post render error with jellyfish. Note: this currently removes transparency.

v4.5.0
- Changed models and textures for the jellyfish. Jellyfish can now glow in the dark.

v4.2.2
Jellyfish and stingrays will no longer poison players out of water.

v3.1.0
- Added jellyfish.
 * }

Trivia

 * When jellyfish models were revamped, there were seven other models that were implemented, but never used. The missing jellyfish textures can be found in the mod files.
 * Despite these models being missing, jellyfish can still be spawned with these models with the  command.
 * Jellyfish are the only passive mobs that poison the player.