--- a/net/minecraft/world/entity/animal/EntityPufferFish.java
+++ b/net/minecraft/world/entity/animal/EntityPufferFish.java
@@ -144,7 +144,7 @@
         int i = this.getPuffState();
 
         if (entityinsentient.damageEntity(DamageSource.mobAttack(this), (float) (1 + i))) {
-            entityinsentient.addEffect(new MobEffect(MobEffects.POISON, 60 * i, 0), this);
+            entityinsentient.addEffect(new MobEffect(MobEffects.POISON, 60 * i, 0), this, org.bukkit.event.entity.EntityPotionEffectEvent.Cause.ATTACK); // CraftBukkit
             this.playSound(SoundEffects.PUFFER_FISH_STING, 1.0F, 1.0F);
         }
 
@@ -159,7 +159,7 @@
                 ((EntityPlayer) entityhuman).connection.sendPacket(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.PUFFER_FISH_STING, 0.0F));
             }
 
-            entityhuman.addEffect(new MobEffect(MobEffects.POISON, 60 * i, 0), this);
+            entityhuman.addEffect(new MobEffect(MobEffects.POISON, 60 * i, 0), this, org.bukkit.event.entity.EntityPotionEffectEvent.Cause.ATTACK); // CraftBukkit
         }
 
     }
