Simplify the following text for a Grade 7 native English-speaking person.
Original: The eruption killed 57 people , nearly 7,000 big game animals ( deer , elk , and bear ) , and an estimated 12 million fish from a hatchery .
Simplified: The eruption killed 57 people , nearly 7,000 game animals ( deer , elk , and bear ) , and about 12 million fish from a fish farm .