Catching unwanted species then throwing them away

A fishing boat that uses a net

 To take advantage of something

Use all the supplies or resources of something

Depleting underwater species by too much fishing

When a ecosystem falls or ends when one of the part is extinct.

Catching fish for commercial benefits(by selling,etc.).

What humans do to the ecosystem

An area that they protect the fish- no fishing allowed.

Areas near the coast

 Free to do something.

harming the balance of the ecosystem by depleting natural resources

Substances that have harmful effects on ecosystems

Ecosystems in the sea

Put someone or something in danger.

All of a single species in one area

to decrease

to use too much of wildlife for human need

to decrease in size, amount, or strength

fishing a lot