Going, Going...Gone?
How do you know when a species has become extinct?
When a species is endangered, scientists should monitor it closely year after year. Accurate information about population size and distribution helps scientists plan conservation efforts and identify areas where the species is in most danger. Then they can take action before it’s too late.
The Pipefish and the Sea Horse
 

In 1994, a South African river pipefish was listed as extinct. But one year later, a healthy new population was discovered. This second chance to save the pipefish might have been lost if scientists hadn’t monitored local species.

Sea horseSome species of sea horse, close relatives of the pipefish, are also under threat. Large numbers are taken from the wild and sold for home aquariums. Sea horses also live in threatened marine habitats, like coral reefs. By tracking sea horse populations, scientists can trace these problems and find solutions. Now they’re working with fishermen to set up sea horse sanctuaries.

What you can do:
Bullet Point

Before you buy a fish for your aquarium, find out if it’s endangered, or if it's from the wild.
 
Bullet Point  

If you visit any coral reefs, be careful not to damage them.