SPIGOT-4003: Fix TropicalFish.getType

src/main/java/org/bukkit/craftbukkit/entity/CraftTropicalFish.java

@@ -5,6 +5,7 @@ import java.util.Map;
 import net.minecraft.server.EntityTropicalFish;
 import org.bukkit.DyeColor;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.entity.EntityType;
 import org.bukkit.entity.TropicalFish;
 
 public class CraftTropicalFish extends CraftFish implements TropicalFish {
@@ -23,6 +24,11 @@ public class CraftTropicalFish extends CraftFish implements TropicalFish {
         return "CraftTropicalFish";
     }
 
+    @Override
+    public EntityType getType() {
+        return EntityType.TROPICAL_FISH;
+    }
+
     @Override
     public DyeColor getPatternColor() {
         return getPatternColor(getHandle().getVariant());