Crabs can be caught on the island. After landing on the island, go to the rocky area on the right and turn over the size of the rocky crabs. It is recommended that you wear gloves in advance, or you will be easily scratched by shellfish. Let's just go fishing by boat. There's not much going on under a net. When you come back, you can buy some shrimps, crabs or something beside it. It's cheap to bargain.