You need the diving gear from the Say Cheese photo shop. Catch the old photo that is blowing in the wind next to the left side of the Lighthouse. You can trade it for the diving gear, then dive at Puffin Point to recover Cap'n Salty's lobster trap.
You fetch the lobster trap.
You dive for Cap'n Salty's lobster trap. (see related question)
go to Big Nate Island and get the diving suit and go to Puffin Point talk to the guy on the docks then point to the water until u see the word dive.
You do not play as Big Nate. He accompanies you around most of the island, and races you on the jet skis.
You can't play "as" Nate, but everywhere you go on the island, he tags along.
There is no Duke among the characters of Big Nate island.
You have to get thescuba gear from the picture guy. Then you go to the light house and dive into the water. Get the crab trap and the light house keeper will give you a lobster and the keys.
When you dive off Puffin Point, you are looking for Cap'n Salty's lost lobster trap. It is the wooden device at the far bottom right. (You can swim to the right before you dive to avoid all the bubbles.)
Big Nate Island was released in February, 2009, and followed by Astro Knights Island in June, 2009.The island after Big Nate island was Astro Knights island in June, 2009.
There is no net on Big Nate island. There is a lobster trap, and you can recover it for Cap'n Salty. Grab the photo blowing around by the lighthouse and take it to the Say Cheese photo shop. The owner will give you some scuba gear to dive for the trap.
You need to have the gear if you do put it on from your ineventory and go tothe water and there will be a button dive your now in the water! === ===
Big Nate Island on the Poptropica map is the 9th from the top.