===================================================================
--- original.js
+++ change.js
@@ -43,62 +43,15 @@
 			top: (2732 - waterGraphics.height) / 2 - 150,
 			bottom: (2732 + waterGraphics.height) / 2 - 150
 		};
 	};
-	self.attachAsset = function (id, options) {
-		var asset = LK.getAsset(id, {});
-		self.addChild(asset);
-		return asset;
-	};
-	var fishGraphics = self.attachAsset('fish', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	self.addChild(fishGraphics);
 });
-var ZebraDanio = Fish.expand(function () {
-	var self = Fish.call(this);
-	var fishGraphics = self.attachAsset('zebraDanio', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	self.addChild(fishGraphics);
-	fishGraphics.scale.set(1, 1);
-	self.speed = Math.random() * 0.2 + 0.4;
-	self._move_migrated = function () {
-		if (!self.directionChangeTime || LK.ticks - self.directionChangeTime > self.directionChangeInterval) {
-			self.directionChangeTime = LK.ticks;
-			self.directionChangeInterval = Math.random() * 90 + 45;
-			self.targetRotation = Math.random() * Math.PI * 2;
-		}
-		var progress = (LK.ticks - self.directionChangeTime) / self.directionChangeInterval;
-		if (progress < 1) {
-			self.rotation += (self.targetRotation - self.rotation) * progress;
-		} else {
-			self.rotation = self.targetRotation;
-		}
-		self.x += Math.cos(self.rotation) * self.speed;
-		self.y += Math.sin(self.rotation) * self.speed;
-		var waterBounds = self.getWaterBounds();
-		if (self.x < waterBounds.left || self.x > waterBounds.right) {
-			self.rotation = Math.PI - self.rotation;
-		}
-		if (self.y < waterBounds.top || self.y > waterBounds.bottom) {
-			self.rotation = -self.rotation;
-		}
-		self.rotation = self.rotation % (Math.PI * 2);
-		fishGraphics.scale.x = Math.cos(self.rotation) < 0 ? -1 : 1;
-		fishGraphics.rotation = self.rotation;
-	};
-	self.addChild(fishGraphics);
-});
 var YellowTang = Fish.expand(function () {
 	var self = Fish.call(this);
 	var fishGraphics = self.attachAsset('yellowTang', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.addChild(fishGraphics);
 	fishGraphics.scale.set(1, 1);
 	self.speed = Math.random() * 0.2 + 0.5;
 	self._move_migrated = function () {};
 });
@@ -107,9 +60,8 @@
 	var fishGraphics = self.attachAsset('wrasses', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.addChild(fishGraphics);
 	fishGraphics.scale.set(1, 1);
 	self.speed = Math.random() * 0.2 + 0.42;
 	self._move_migrated = function () {};
 });
@@ -118,9 +70,8 @@
 	var fishGraphics = self.attachAsset('tangfish', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.addChild(fishGraphics);
 	fishGraphics.scale.set(1, 1);
 	self.speed = Math.random() * 0.2 + 0.47;
 	self._move_migrated = function () {};
 });
@@ -918,27 +869,8 @@
 		fishGraphics.scale.x = Math.cos(self.rotation) < 0 ? -1 : 1;
 		fishGraphics.rotation = self.rotation;
 	};
 });
-var CometFish = Fish.expand(function () {
-	var self = Fish.call(this);
-	var fishGraphics = self.attachAsset('cometFish', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	fishGraphics.scale.set(1, 1);
-	self.speed = Math.random() * 0.2 + 0.6;
-	self._move_migrated = function () {
-		self.x += Math.cos(LK.ticks / 70) * self.speed;
-		self.y += Math.sin(LK.ticks / 70) * self.speed;
-		var waterBounds = self.getWaterBounds();
-		if (self.x < waterBounds.left || self.x > waterBounds.right || self.y < waterBounds.top || self.y > waterBounds.bottom) {
-			self.x = Math.max(waterBounds.left, Math.min(self.x, waterBounds.right));
-			self.y = Math.max(waterBounds.top, Math.min(self.y, waterBounds.bottom));
-		}
-		fishGraphics.rotation = Math.atan2(Math.sin(LK.ticks / 70), Math.cos(LK.ticks / 70));
-	};
-});
 var Clownfish = Fish.expand(function () {
 	var self = Fish.call(this);
 	var fishGraphics = self.attachAsset('clownfish', {
 		anchorX: 0.5,
@@ -985,42 +917,8 @@
 	fishGraphics.scale.set(1, 1);
 	self.speed = Math.random() * 0.2 + 0.5;
 	self._move_migrated = function () {};
 });
-var CelestialPearlDanio = Fish.expand(function () {
-	var self = Fish.call(this);
-	var fishGraphics = self.attachAsset('celestialPearlDanio', {
-		anchorX: 0.5,
-		anchorY: 0.5
-	});
-	fishGraphics.scale.set(1, 1);
-	self.speed = Math.random() * 0.2 + 0.35;
-	self._move_migrated = function () {
-		if (!self.directionChangeTime || LK.ticks - self.directionChangeTime > self.directionChangeInterval) {
-			self.directionChangeTime = LK.ticks;
-			self.directionChangeInterval = Math.random() * 80 + 40;
-			self.targetRotation = Math.random() * Math.PI * 2;
-		}
-		var progress = (LK.ticks - self.directionChangeTime) / self.directionChangeInterval;
-		if (progress < 1) {
-			self.rotation += (self.targetRotation - self.rotation) * progress;
-		} else {
-			self.rotation = self.targetRotation;
-		}
-		self.x += Math.cos(self.rotation) * self.speed;
-		self.y += Math.sin(self.rotation) * self.speed;
-		var waterBounds = self.getWaterBounds();
-		if (self.x < waterBounds.left || self.x > waterBounds.right) {
-			self.rotation = Math.PI - self.rotation;
-		}
-		if (self.y < waterBounds.top || self.y > waterBounds.bottom) {
-			self.rotation = -self.rotation;
-		}
-		self.rotation = self.rotation % (Math.PI * 2);
-		fishGraphics.scale.x = Math.cos(self.rotation) < 0 ? -1 : 1;
-		fishGraphics.rotation = self.rotation;
-	};
-});
 var CardinalTetra = Fish.expand(function () {
 	var self = Fish.call(this);
 	var fishGraphics = self.attachAsset('cardinalTetra', {
 		anchorX: 0.5,
@@ -1194,24 +1092,27 @@
 var aquarium = game.addChild(new Aquarium());
 game.setBackgroundColor(0x008080);
 var fishes = [];
 var fishTypes = [Wrasses, Parrotfish, Dartfish, MoorishIdol, Tangfish, Bannerfish, Butterflyfish, Mandarinfish, Lionfish, Surgeonfish, Pufferfish, Clownfish, Angelfish, KoiFish, EmperorFish, Goldfish, Sunfish, GuppyFish, BettaFish, DiscusFish, NeonTetra, OscarFish, PsychedelicFrogfish, FlameScallop, RibbonEel, LeafySeaDragon, ClownTriggerfish, ElectricBlueDamsel, YellowTang, FlameHawkfish, RoyalGramma, FlameAngel, BlueTang, Moonfish, Starfish, CardinalTetra];
-var fishTypes = [ZebraDanio, CelestialPearlDanio, Wrasses, Parrotfish, Dartfish, MoorishIdol, Tangfish, Bannerfish, Butterflyfish, Mandarinfish, Lionfish, Surgeonfish, Pufferfish, Clownfish, Angelfish, KoiFish, EmperorFish, Goldfish, Sunfish, GuppyFish, BettaFish, DiscusFish, NeonTetra, OscarFish, ElectricCatfish, RainbowTrout, PsychedelicFrogfish, FlameScallop, RibbonEel, LeafySeaDragon, ClownTriggerfish, ElectricBlueDamsel, YellowTang, FlameHawkfish, RoyalGramma, FlameAngel, BlueTang, Moonfish, Starfish, GlassCatfish, DiamondTetra, PeacockBass, CrimsonSnapper, CardinalTetra, CometFish, EmeraldGoby];
-fishTypes.forEach(function (fishType) {
-	var fish = new fishType();
+for (var i = 0; i < fishTypes.length; i++) {
+	var fish = new fishTypes[i]();
 	if (typeof fish._move_migrated === 'function') {
 		var waterBounds = aquarium.getWaterBounds();
-		var centerX = waterBounds.left + (waterBounds.right - waterBounds.left) / 2;
-		var centerY = waterBounds.top + (waterBounds.bottom - waterBounds.top) / 2;
-		var maxDistance = 600;
+		var waterWidth = waterBounds.right - waterBounds.left;
+		var waterHeight = waterBounds.bottom - waterBounds.top;
+		var waterCenterX = waterBounds.left + waterWidth / 2;
+		var waterCenterY = waterBounds.top + waterHeight / 2;
+		var maxDistanceX = waterWidth / 2 * 0.8;
+		var maxDistanceY = waterHeight / 2 * 0.8;
 		var angle = Math.random() * Math.PI * 2;
-		var distance = Math.random() * maxDistance;
-		fish.x = centerX + Math.cos(angle) * distance;
-		fish.y = centerY + Math.sin(angle) * distance;
+		var distanceX = Math.random() * maxDistanceX;
+		var distanceY = Math.random() * maxDistanceY;
+		fish.x = waterCenterX + distanceX * Math.cos(angle);
+		fish.y = waterCenterY + distanceY * Math.sin(angle);
 		fishes.push(fish);
 		game.addChild(fish);
 	}
-});
+}
 LK.on('tick', function () {
 	for (var i = 0; i < fishes.length; i++) {
 		fishes[i]._move_migrated();
 	}