Squid lives in sandy shallow seabed and gravel waters, and feeds on small fish, shrimps and aquatic insects. It is greedy, but it eats the hook slowly, so the fisherman can sink the fish with a hand pole or a throwing pole. If you throw the rod and feel the tip of the rod vibrate frequently, it means that the catfish bites the hook and eats the bait, but you can't lift the rod immediately until the action becomes bigger and the rod bends down. Generally, it takes 50 ~ 60 seconds from finding the hook to lifting the rod, that is, the squid has put the hook in its mouth.
Catfish catching may not be able to bring it ashore, which is another feature of catfish, that is, "stickiness". If the winding is too slow when lifting the pole, or the line is loose, then the fish will touch the seabed reef, and the catfish will immediately secrete a liquid like glue from the skin, and immediately stick the flat body side to the reef, which feels like hooking a big stone on the seabed. If the fisherman pushes hard, he will break his mouth, and catfish will quickly discharge liquid to remove mucus, leave the reef and drill into the sand. After a few days, the fish's mouth will grow back. In this regard, after the squid eats the hook for about 60 seconds, it is necessary to quickly shake the pay-off device to pull the fish so that it cannot get close to the reef. This fishing method is called "slow fishing and quick lifting of flounder".