It was here in June, which meant that many new bugs and fish appeared in Animal Crossing: New Horizons.
Keep up with them as they will stay for more than a month, but make sure you donate any new discoveries to Blathers to complete the museum. You can tell when you have captured a new creature, because your character will shout "Yes!". Before they say the name of the bug or fish. If you have difficulty catching these bugs and fish, you can choose to use ACNH Bells to buy some tools, which will help you alleviate the difficulties and let you enjoy the fun of this session.
You can also check your animal encyclopedia to see if you have donated small insect fish. If there is one, a little owl icon will appear next to the name of the little animal. Please note that if you are on someone else's island, these flags will not be displayed.
Most notably, there will be more and more sharks in the northern hemisphere. It is very profitable to collect sharks, and it is easy to find because the shark's fins will stick out of the water. However, players should pay attention to the sark fish, which is more dangerous!
To learn about the fish and bugs of all the islands, you can visit the news page on IGGM's official website. They divided the list according to the hemisphere. Of course, if you need Animal Crossing Bells or Nook miles Ticket, their website can also provide you with security.