"C'est il" > Means nothing in french

"C'est lui" or "C'est elle" is better > "It's him / her"

The Japanese text says "it's here"
Aye, it's bad French. It should have been "C'est ici."

What is the isurus and why is it in all capitals?

Isurus are Mako Sharks. For some reason, they wanted to use the specific name instead of the more common name.