Sound a bit more familiar now?
These shark tend to eat a wide variety of bony fish, as well as cartilaginous fish and invertebrates. This includes, but is not limited to herring, eels, mullet, groupers, grunts, croakers, bluefish, mackerel, tunas, various flatfish, a variety of sharks, skates and rays, crabs, octopuses, squid, starfish and sometimes human refuse.
Young dusky sharks may be preyed upon by larger sharks, such as bull sharks. Mature dusky sharks probably don’t have many predators. However, a copepod (Pandarus sinuatus) is parasitic and loves the dusky.
On a global scale, dusky shark populations are considered at-risk, the IUCN assessing these animals as "Near Threatened." The dusky shark in the western North Atlantic and Gulf of Mexico is listed as "Vulnerable" due to a population reduction of 20% over the last ten years.