- Although the flesh of the almaco jack is considered quality table fare, the species has been associated with ciguatera poisoning, a seldom fatal stomach irritation.
- The almaco jack is susceptible to tapeworm parasites in the caudal peduncle area, but the meat can be eaten safely if affected portions are cut away.
Blacknose shark (Carcharhinus)
Blacknose sharks are a relatively small species of shark. The color on their back and sides ranges from gray to gray-green to brown, and because of this coloration blacknose sharks are often confused with lemon sharks. There is a distinctive dark spot on the tip of the snout, though it tends to fade with age. The second dorsal fin and tail fin have dark tips. They have the elongate, sleek bodies common of the requiem family of sharks. Both the first dorsal fin and the pectoral fins are small, and the upper lobe of the tail fin is longer than the lower lobe. The snout is long and the gill slits are short.
Blacknose sharks are carnivores, with small fishes the main part of their diet, including pinfish and porcupine fish. They also commonly consume octopus.
Blacknose sharks are found in the western Atlantic from North Carolina to southern Brazil, including the Gulf of Mexico. They are most common in the Caribbean.
Blacknose sharks are an inshore species that inhabit areas over the continental or insular shelf. They are a shallow water species that will rarely be found at depths greater than 32 feet. They are associated with areas over sandy, shell and coral bottoms. Blacknose sharks commonly form large schools and prefer warm waters.
- Blacknose sharks are commonly eaten by larger sharks.
- Like other sharks, blacknose sharks are born tail first.
- When approached by divers, blacknose sharks will perform a hunch display, arching their back, raising their head and lowering their tail. This is meant to be threatening, though this species is harmless to man.