Let me break down the requirements:

1. Large glass aquarium with side panel
2. User can drag the crack vertically before triggering failure
3. Lower crack = stronger jet initially
4. Water escapes through opening with flow strength based on water depth
5. Curved water jet affected by gravity
6. Spreading puddle colliding with room boundaries
7. Fish, rocks, plants, floating toy reacting to:
   - Density
   - Buoyancy
   - Drag
   - Current
8. Objects transition from underwater → airborne → floor collisions
9. Fish attempt to swim against current before being swept through breach
10. Glass fragments with angular velocity, collisions, water resistance
11. Visible waterline that lowers continuously
12. Single HTML file with inline CSS/JS
13. No external resources/CDNs

This is a complex physics simulation. Let me plan the structure:

1. Canvas-based rendering
2. Physics objects:
   - Water particles (for jet and puddle)
   - Fish (with AI to swim against current)
   - Rocks (sink, collide)
   - Plants (anchored, sway with current)
   - Floating toy (buoyant)
   - Glass fragments (angular velocity, drag)
3. Water tank simulation:
   - Water level tracking
   - Flow rate based on depth (Torricelli's law: v = sqrt(2gh))
   - Crack

The user wants a complex physics simulation of an aquarium bursting. Let me break down the requirements:

1. Large glass aquarium with a side panel that develops a crack and bursts
2. Water escaping with flow based on depth (Torricelli's law - stronger at bottom)
3. Curved water jet affected by gravity (projectile motion)
4. Spreading puddle that collides with room boundaries
5. Fish, rocks, plants, floating toy with different physics (density, buoyancy, drag, current)
6. Objects transitioning: underwater → airborne → floor collisions
7. Fish swimming against current before being swept through breach
8. Glass fragments with angular velocity, collisions, water resistance
9. Visible waterline that lowers continuously
10. User can drag crack vertically before triggering
11. Lower crack = stronger initial jet

This is a complex simulation. I'll need:
- Canvas for rendering
- Physics engine for particles/objects
- Water simulation with particle system
- Object classes for fish, rocks, plants, toy, glass fragments
- State management for water level, crack position
- Interaction for dragging crack

Let me create this step by step in a single HTML file.

Key physics:
- Torricelli's law: v = sqrt(2gh) where h is depth from crack to water surface
- Projectile

I need to create a comprehensive physics simulation of an aquarium bursting. This is a complex project that needs:

1. A glass aquarium visualization
2. Water physics (flow based on depth, curved jet with gravity, puddle spreading)
3. Various objects (fish, rocks, plants, floating toy) with different physics properties
4. State transitions (underwater → airborne → floor)
5. Fish AI (swim against current, then get swept)
6. Glass fragments with physics
7. Visible waterline lowering
8. User interaction (drag crack vertically)
9. Crack propagation and burst

Let me structure this carefully:

1. Canvas-based rendering
2. Physics engine for

The user wants me to create a single HTML file with a physics simulation of an aquarium cracking and bursting. This is a complex simulation that needs:

1. A glass aquarium with water
2. A crack that can be dragged vertically by the user
3. Water physics:
   - Flow based on water depth (Torricelli's law: velocity ∝ √(2gh))
   - Curved water jet affected by gravity
   - Spreading puddle with boundary collisions
   - Lowering waterline

4. Objects with different physics:
   - Fish (attempt to swim against current, then get swept out)
   - Rocks (sink, affected by drag)
   - Plants (some buoyancy, drag)
   - Floating toy (floats, affected by current)
   - All need to transition from water → air → floor

5. Glass fragments with:
   - Angular velocity
   - Collisions
   - Water resistance

Let me create this simulation. I'll use canvas for rendering and implement a custom physics engine.

Key physics:
- Torricelli's law for water jet velocity: v = √(2gh) where h is the height of water above the crack
- Projectile motion for water particles
- Buoyancy force = ρ_water × V_displaced × g
- Drag force = 0.5 × ρ ×