Grouper fishing is a professional production technology, and determining the settlement and active water layer of grouper is the key to grouper fishing. Epinephelus migrates to shallow water in late spring and early summer, but the water depth is still about 30 meters, and most of the fish caught in the 20-meter water area are small individuals. For grouper fishing, you can choose the rocky area with low wind and clear water quality, find the slow-flowing area of backflow, and hook between gravel and reef, and generally you can catch grouper. The spawning period of grouper is from April to June. After spawning, the food intake of grouper is greatly increased, and the best fishing period is 6-65438+ 10. From late autumn to spring, groupers will hide in deep-water reef holes for the winter, so it is very difficult to catch groupers. There are two ways to catch grouper: boat fishing and rock fishing. Rock fishing is mostly for leisure fishing, while boat fishing is a fishing skill for productive fishing. (1) Hand fishing group for boat fishing. Its structure is as follows: nylon wire with tension of 18kg (40lbs) or wire diameter of more than 0.6mm is used as the bus bar, at the end of the bus bar, 60g core drop is tied between the connecting rings, and steel wire is used to replace the branch line, so that single hook or double hook can be hung, single wing can be hung for balance, and the hook is tied at the wing tip. This grouper has a keen sense of taste and smell. Although fierce, he is cautious and picky about biting the hook. It likes to eat fresh fish and shrimp. Grouper won't bite the hook, so when using small fish and fresh shrimp as bait, the tip of the hook should be at the tail as far as possible, so as to keep the activity of the bait to lure fish. Some anglers use loach as bait, that is, they use loach's turning in the water to lure fish to take the bait and improve the bait rate. The characteristic of grouper's bite hook is to bite first and then swallow. After the impact hook is put on the bait, it will quickly retreat. At this time, although the handle is obviously pressed down or the pole tip is obviously pressed down, it is not appropriate to take up the line and lift the pole. Before hooking the fish lip, you should loosen the line and put it down or hold the rod for a second reaction. The grouper has developed eyesight, and the speed of finding bait is very slow. When fishing with a fishing rod, the fishing line should be pulled repeatedly to attract the attention of the fish with the dynamic movement of the bait. (2) In rock fishing, a reinforced superhard fishing rod and a strong fishing reel should be selected, and the control of the pull button should be turned to the limit, because the impact of the fish is too great, which will damage the fishing tackle. After the grouper is lifted out of the water, attention should be paid to taking exhaust measures immediately. Specifically, immediately after the fish lies on the deck or the ground, the prepared 10cm steel needle penetrates into the abdominal cavity 2-3 cm deep from the inside of the fish covered by pectoral fins, so as to exhaust air through the abdominal cavity. This is because the pressure decreases after the fish is lifted out of the deep water, and it will swell to death if it is not vented after coming out of the water.