===================================================================
--- original.js
+++ change.js
@@ -7,13 +7,16 @@
 			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;
+			var rotationDifference = Math.abs(self.targetRotation - self.rotation);
+			var inertiaMultiplier = rotationDifference > Math.PI / 2 ? 0.5 : 1;
+			self.rotation += (self.targetRotation - self.rotation) * progress * inertiaMultiplier;
 		} else {
 			self.rotation = self.targetRotation;
 		}
-		var tentativeX = self.x + Math.cos(self.rotation) * self.speed;
+		var speedMultiplier = Math.random() < 0.1 ? 2 : 1;
+		var tentativeX = self.x + Math.cos(self.rotation) * self.speed * speedMultiplier;
 		var tentativeY = self.y + Math.sin(self.rotation) * self.speed;
 		var waterBounds = self.getWaterBounds();
 		tentativeX = Math.max(waterBounds.left + 50, Math.min(tentativeX, waterBounds.right - 50));
 		tentativeY = Math.max(waterBounds.top + 50, Math.min(tentativeY, waterBounds.bottom - 50));
@@ -22,18 +25,80 @@
 			self.y = tentativeY;
 		} else {
 			self.avoidObstacles(self.getNearbyObstacles());
 		}
+		var nearbyFish = self.getNearbyObstacles();
+		var alignmentRotation = 0;
+		var alignmentCount = 0;
+		for (var i = 0; i < nearbyFish.length; i++) {
+			var fish = nearbyFish[i];
+			var dx = self.x - fish.x;
+			var dy = self.y - fish.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			if (distance < 200) {
+				alignmentRotation += fish.rotation;
+				alignmentCount++;
+			}
+		}
+		if (alignmentCount > 0) {
+			alignmentRotation /= alignmentCount;
+			self.rotation = (self.rotation + alignmentRotation) / 2;
+		}
+		if (Math.random() < 0.02) {
+			self.speed *= 0.5;
+		}
 		self.rotation = self.rotation % (Math.PI * 2);
+		if (Math.random() < 0.005) {
+			LK.effects.splash(self.x, self.y, 0x1CA3EC, 500);
+		}
+		var isFishClose = self.getNearbyObstacles().some(function (obstacle) {
+			var dx = self.x - obstacle.x;
+			var dy = self.y - obstacle.y;
+			return Math.sqrt(dx * dx + dy * dy) < 150;
+		});
+		if (isFishClose) {
+			fishGraphics.tint = 0x88FFFF;
+		} else {
+			fishGraphics.tint = 0xFFFFFF;
+		}
 		fishGraphics.scale.x = Math.cos(self.rotation) < 0 ? -1 : 1;
+		if (Math.random() < 0.01) {
+			fishGraphics.blink();
+		}
 		fishGraphics.rotation = self.rotation;
 	};
-	self.avoidObstacles = function (obstacles) {};
+	self.avoidObstacles = function (obstacles) {
+		for (var i = 0; i < obstacles.length; i++) {
+			var obstacle = obstacles[i];
+			var dx = self.x - obstacle.x;
+			var dy = self.y - obstacle.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			if (distance < 100) {
+				self.targetRotation = Math.atan2(dy, dx) + Math.PI;
+				break;
+			}
+		}
+	};
 	self.isPathBlocked = function (newX, newY, obstacles) {
+		for (var i = 0; i < obstacles.length; i++) {
+			var obstacle = obstacles[i];
+			var dx = newX - obstacle.x;
+			var dy = newY - obstacle.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			if (distance < 50) {
+				return true;
+			}
+		}
 		return false;
 	};
 	self.getNearbyObstacles = function () {
-		return [];
+		var nearbyObstacles = [];
+		for (var i = 0; i < fishes.length; i++) {
+			if (fishes[i] !== self) {
+				nearbyObstacles.push(fishes[i]);
+			}
+		}
+		return nearbyObstacles;
 	};
 	this.getWaterBounds = function () {
 		var waterGraphics = LK.getAsset('water', 'Water Graphics', 0, 0);
 		return {