Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Chain catshark:

"

The chain catshark has been described as "gorgeous",[3] and this, combined with its small size, makes it a popular cold-water aquarium fish.[4][2] It is frequently displayed and bred at public aquariums.[5][4] Research in shark behavior, including reproduction, has been done in chain catsharks kept in public aquariums or laboratories.[5][6]