Pufferfish

Pufferfish are a type of aquatic mob in Minecraft found primarily in warm or lukewarm ocean biomes. They are passive and do not attack players or other mobs. However, when approached by a player, axolotl, or non-aquatic mob, they defensively inflate, causing damage and inflicting poison. There are three stages of inflation: unpuffed, semi-puffed, and fully puffed, each with different damage and poison durations. Pufferfish do not swim in schools and can be captured with a bucket. They are also a poisonous food item that can be used to brew Water Breathing potions. They can be obtained through fishing as well, but eating them results in negative effects. In Bedrock Edition, pufferfish are considered aquatic mobs, affected by Impaling enchantments, and fully inflate instantly when damaged. They suffocate if left out of water. In Hypixel SkyBlock, Pufferfish are a common collection item obtained through fishing or fishing minions, and they can also be bought from the Fish Merchant.