Angel Sharks mainly live in sandy muddy bottoms of the ocean, because they are ambush predators and  bury themselves on the bottom of the ocean. Their prey are mainly fish, crustations, mollusks, and  comorant. 

Some threats  to the Angel Shark involve entanglement in nets, reduction to prey, and climate change.  Acidification in the ocean waters and rising temperatures are causing ecological damage.

Primary predators of Angel Sharks are bull sharks, great hammerhead, and bull ray. Other predators include tuna, mackerel, grouper, dolphins, seals, sea lions, great white sharks, Broadnose Sevengillshark,  and Northern elephant seals.  

This is how the Food Web/Chain is in the ecosystem of the Angel Shark