Done! I've remade Fish World in 3D using Three.js with:

- **3D underwater environment** with rocky seabed, seaweed, and rising bubbles
- **Generated 3D models** for player fish, prey fish, and predator sharks
- **Dynamic camera** that follows your fish and zooms out as you grow
- **Same gameplay mechanics**: eat smaller fish to grow, avoid larger predators, collect shield bubbles
- **Visual effects**: fog, underwater lighting, shield glow effect, fish wobble animation

Controls: WASD/Arrow keys or mobile joystick to swim around.

**Next Ideas:**
1. **Underwater Sound Effects** - Add ambient ocean sounds, eating/growing SFX, and danger warning when predators are near
2. **Day/Night Cycle** - Dynamic lighting that shifts from bright blue to darker depths with bioluminescent creatures

**Ready to level up your game? Pick one and let's build it!**