How did crayfish become endangered?

Answer 1

Because they are delicious!!

No seriously here is what I found:

"Crayfish are threatened by habitat destruction caused by dams, water pollution, erosion, siltation, in-stream gravel dredging and, particularly, the introduction of nonnative crayfishes and other exotics. About 65 species of crayfish are endangered, threatened, or listed as species of special concern by the states in which they live, and 48 percent of our native crayfish species are in need of protection. These numbers are best estimates only. The exact status of crayfish endangerment or extinction rates in the United States is largely unknown because very few distribution and population surveys have been completed. "

Here is a link to the site where I found this information:

http://www.ext.vt.edu/pubs/fisheries/420-524/420-524.html

Answer 2

Most hermit crabs actually are not endangered, just some are rare. Although, unless humans change their ways, the whole world of animals are likely to go extinct. So, be glad they aren't endagered, and try not to pick many seashells when you go to the beach. leave 'em for the crabs!

Answer 3

People kill them for, food, hobby or for fun

Answer 4

People kill them for fun and nobody notices that they are endangered.

Answer 5

by hanging upside down