Because during the toad breeding season, male toads that have not found a mate will mistake the fish for a female and hold it tightly for a cuddle.

The male toads hold the fish's head tightly in order to stimulate the female toad to ovulate, but this will only make the fish feel pain and will not ovulate at all, so the toads will hold the fish tighter and tighter. The "golden toad holding the carp" occurs mostly from February to March, which corresponds to the breeding season of the toads, and the toad holding the fish's head is exactly the same as the toad holding the right posture.

Expanded information:

Many people will be the folk "golden toad holding the carp" allegory as a good omen, but there are some netizens think that anglers should be the toad down after the

These are the first time that an angler has released a carp in the world, and it's the only way to do so.

Because of the cultural symbolism, the toad has become a golden toad; the carp has become a koi carp. One is for wealth and one for prosperity. So the two together is known as the "Golden Toad Carp", which implies prosperity, wealth and good fortune.