Ecosystem

I have three organisms in this ecosystem, each with three different states. 

1. Sharks (respawn if none of them left/from reproduction; die naturally/poisoned)

1st & 2nd State: baby shark & young shark

•  move freely underwater

3rd State: adult shark 

• move faster than the previous state
• hunt prey if it is within its hunt range
• back to slow movement after hunting

4th State: hunting shark

• move faster towards its prey and  hunt them (instant destroy)

5th State: reproducing shark

• move at normal speed and give birth (respawn) to a baby shark and die after a certain period

6th State: poisoned by jellyfish

• if entered jellyfish's poison zone, die immediately (instant destroy)

2. Small fish (respawn if none of them left/from reproduction; die naturally/poisoned/preyed)

1st State: baby fish

• find the nearest coral and move between corals, cannot be preyed on by sharks

2nd State: young fish

• move freely at a faster speed underwater, cannot be preyed on by sharks

3rd State: adult fish

• move freely at a faster speed underwater, can be preyed on by sharks
• if entered a shark's hunting range, escape at a faster speed

4th State: reproducing fish 

• during reproduction, no movement lays eggs around its position

5th State: poisoned by jellyfish

• if entered jellyfish's poison zone, die immediately (instant destroy)

3. Jellyfish (respawn if none of them left; die naturally/preyed)

1st State: normal state

• move very slowly underwater, can be preyed on by sharks

2nd State: escaping state

• if entered a shark's hunting range, escape at a faster speed

3rd State: poisoning state

• start poisoning once in a while, cannot be prey on
• no movement during the poisoning 
• if others enter the poison zone, die immediately