Affiliate Marketing Secrets

Grey reef sharks are crepuscular so they are most active at dawn and dusk. They specialize in foraging at depths below 20 meters in both forereef and backreef environments. Grey reef sharks will leave the reef at night to forage in the pelagic zone and dive to grater depths. For the most part resting, foraging and any possible social behaviors all occur in close to the reef.

I’m trying to understand the meaning of niche picking, and from what I am seeing right now, it stands for the process of seeking environments for something.. but i can’t quite understand.
could somebody give me an example as well please?!

They are both apex or tertiary predators (top of the food chain) so in that way they inhabit the same niche in different environments.