Identify which animal species is alive or extinct: Thylacoleo, Skipjack Tuna
Thylacoleo is extinct, Skipjack Tuna is alive.
### Instruction: Identify which animal species is alive or extinct: Thylacoleo, Skipjack Tuna
### Context: 
### Answer: Thylacoleo is extinct, Skipjack Tuna is alive.</s>