--- a/net/minecraft/server/EntityDolphin.java
+++ b/net/minecraft/server/EntityDolphin.java
@@ -95,7 +95,7 @@
         this.goalSelector.a(5, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 6.0F));
         this.goalSelector.a(5, new PathfinderGoalWaterJump(this, 10));
         this.goalSelector.a(6, new PathfinderGoalMeleeAttack(this, 1.2000000476837158D, true));
-        this.goalSelector.a(8, new EntityDolphin.d(null));
+        this.goalSelector.a(8, new EntityDolphin.d()); // CraftBukkit - decompile error
         this.goalSelector.a(8, new PathfinderGoalFollowBoat(this));
         this.goalSelector.a(9, new PathfinderGoalAvoidTarget(this, EntityGuardian.class, 8.0F, 1.0D, 1.0D));
         this.targetSelector.a(1, new PathfinderGoalHurtByTarget(this, true, new Class[] { EntityGuardian.class}));
@@ -412,7 +412,7 @@
         }
 
         public void c() {
-            this.c.addEffect(new MobEffect(MobEffects.DOLPHINS_GRACE, 100));
+            this.c.addEffect(new MobEffect(MobEffects.DOLPHINS_GRACE, 100), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.DOLPHIN); // CraftBukkit
         }
 
         public void d() {
@@ -429,7 +429,7 @@
             }
 
             if (this.c.isSwimming() && this.c.world.random.nextInt(6) == 0) {
-                this.c.addEffect(new MobEffect(MobEffects.DOLPHINS_GRACE, 100));
+                this.c.addEffect(new MobEffect(MobEffects.DOLPHINS_GRACE, 100), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.DOLPHIN); // CraftBukkit
             }
 
         }