The habits of the cobia are not unlike those of the pike, or mascalonge, of fresh waters, in that it is solitary and lies in wait for its prey, and is almost as rapacious. It lies under the mangroves and cocoa-plum bushes along Indian River and other streams of the east coast of Florida, watching for stray fishes and crabs on which it feeds. It is commonly seen of a length of two or three feet, but grows considerably longer, with a weight of fifteen to twenty pounds. The largest I have seen was at Key West; it was fully five feet long. It is not uncommon in the Chesapeake Bay, and like most of the mackerel tribe it is a fairly good food-fish. It spawns in summer, but its breeding habits are not fully understood.
As might be imagined from its shape and habits, it is a good game-fish, and quite strong and vigorous on the rod. It requires all of the angler's skill to land it safely, especially when it is taken about the mangroves, among whose arching and numerous roots it is sure to take refuge if it can do so. It will take a small fish bait or a crab, going for it with a pikelike rush. I once took one on Indian River with a large red ibis fly, but never succeeded in catching another with the same lure.
A strong, rather heavy rod is necessary for the cobia, which the Key West fishermen call cobi-ó. A striped-bass chum rod of natural bamboo is a good and serviceable tool for the work, with multiplying reel and braided linen line, to which is affixed a Sproat hook, No. 3-0, on gimp snell, by a brass box-swivel. A sinker should not be used about the mangroves.
A fiddler-crab, a mullet, or other small fish is hooked through the lips, and is cast from a boat to the edge of the mangroves or other bushes, in the same way as in casting for mascalonge in northern waters. I have never tried casting with a spoon, which might be successful, but a minnow is better by far. The cobia takes the bait with a fierce lunge, and turning quickly endeavors to return to his lair, a proceeding that must be thwarted by the angler at all hazards to his rod or tackle, for once under the arching roots of the mangroves he is as good as gone. The boat must be rowed to open water at once, while a strong strain is maintained by the rod on the fish. With open water the angler can play his fish with leisure, though he will be severely taxed by the struggles of as game a fish as he is likely to meet during a winter's sojourn in Florida.
THE SPOTTED WEAKFISH
(Cynoscion nebulosus)
Cynoscion nebulosus. The Spotted Weakfish. Body rather elongate, compressed; head 3-1/2; depth 4-1/2; scales 10-70-11; D. X-I, 26; A. II, 10; eye 7; snout long and acute; mouth large, maxillary reaching to posterior edge of eye; lower pharyngeals narrow, each with 7 or 8 series of short teeth, the inner enlarged; maxillary, preorbital, and lower jaw naked; canines in upper jaw strong; lower jaw without canines, other teeth in narrow bands, sharp, but closely set; membrane of preopercle serrate, the bone entire; pseudobranchiæ well developed; caudal lunate; soft rays of dorsal and anal scaleless; gill-rakers short and thick, 4 + 7.
This fish is closely allied to the northern weakfish, and belongs to the same family, Sciænidæ. It is known very generally in Florida as trout, salt-water trout, or sea-trout, owing to its spots. It is, of course, not a trout at all, and these names should be set aside; moreover, the name sea-trout is preoccupied by the sea-run brook-trout of the Gulf of St. Lawrence. Its present specific name, nebulosus, or "clouded," was bestowed by Cuvier and Valenciennes, in 1830, displacing the earlier and better name maculatus, or "spotted," conferred by Dr. S. L. Mitchill, in 1815, for reasons that it is unnecessary to refer to here. It is abundant from Virginia to Florida, and along the Gulf coast to Texas. It occasionally strays as far north as New Jersey.
It is almost the counterpart of the common weakfish in the form of its body, the depth of which is about a fourth of its length, and with a similar head, eye, and mouth, but with somewhat smaller scales, and a few less rays in the second dorsal fin. Its mouth is large, with narrow bands of sharp teeth on the jaws, and two long canine teeth in the upper jaw.