Atlantic Bumper, Chloroscombrus chrysurus
The Atlantic Bumper, Chloroscombrus chrysurus, whose common Spanish name is horqueta del Atlántico, is a member of the Jack or Carangidae Family, known collectively as jureles and pámpanos in Mexico. Globally, there are only two species in the genus Chloroscombrus, both of which are found in Mexican waters, one in the Atlantic and one in the Pacific. The species described herein is found in the Pacific.
The Atlantic Bumpers have strongly compressed oval bodies with a ventral profile that is more convex than the dorsal profile and a body depth that is 38 to 42% of standard length. Their appearance is more “pompano-like” than “jack-like”. They are dark metallic blue dorsally and transition to silvery ventrally. They have a black spot on the upper border of their gill cover and a black saddle on their upper tail base. Their fins are yellow with the exception of the pelvic fins which are white. Their head has a very short snout with a blunt tip and a small oblique mouth that extends past the front of their eyes. Their anal fin has two detached spines, one connected spine, and 25 to 28 rays; their caudal fin is deeply forked with a slender base and an upper lobe that is longer than the lower lobe; their first dorsal fin has eight spines; their second dorsal fin has one spine and 25 to 28 rays; and their pectoral fins are curved and longer than the head. They have a pronounced lateral line with a short anterior arch and 5 to 15 scutes on their caudal fin base. They have a total of 39 to 49 gill rakers. Their body is covered with scales.
The Atlantic Bumpers are a pelagic species found in large schools in shallow coastal lagoons and estuaries from the surface to depths of 350 feet. They reach a maximum length of 33.5 cm (13 inches). They feed on fish, cephalopods, detritus, and zooplankton. Juveniles are common in brackish estuaries and can be found well offshore and often associated with jellyfish. They are a poorly studied species and very little is known about their behavior patterns.
In Mexican waters the Atlantic Bumpers are found in all waters of the Atlantic.
The Atlantic Bumper is most likely confused with the Bluntnose Jack, Hemicaranx amblyrhynchus (lower profile not convex).
The Atlantic Bumpers are caught primarily as a by-catch of trawls and seines but are also caught by hook and line. They are not fished commercially. They are utilized fresh, frozen, smoked, dried-salted and in fishmeal, fish oil, and petfood. They are widely distributed and locally abundant. From a conservation perspective, they are currently classified as of Least Concern. They are one of the most abundant and unexploited species in the Gulf of Mexico.
Atlantic Bumper, Chloroscombrus chrysurus. Fish caught off the Tybee Pier, Savannah, Georgia, October 2009. Length: 23.0 cm (9.1 inches). Catch, photo, and identification courtesy of Kenneth Tse, Toronto, Canada.