Microplastics make the world go round inAnother Crab’s Treasure. You’ll eventually use this currency to purchase items from shops and unlock other goodies in theunderwater souls-like indie. As you start the game, you’ll come across a bunch of random items, from clothes pins to those tiny little pieces of plastic that you use to keep bagel/bread bags sealed.
If you read the descriptions of some of these items, it’ll straight up tell you totrade them in for Microplastics; however, you won’t actually be able to trade in any items until getting a few hours of playtime and making it to the city ofNew Carcinia. There, you’ll meet a fishy NPC named Prawnathan who sells and buys Junk.

Where to Sell Items and Junk for Microplastic in Another Crab’s Treasure
Once you eventually make it to New Carcinia as part of the main story path, you can jump down into the Lower Crust to explore a couple of different shops. Kril will need to speak to a couple of NPCs to progress the quest, and one of those NPCs isPrawnathan of the Prawn shop, as seen in the image above.
If you’re entering New Carcinia’s lower section from the northern area, just head straight in and keep going southwest until you see the shop to your left-hand side.

If you’re speaking to him as part of the story, a cutscene will occur that shows what happens to the lower section during Trash Day. Once the scene ends, you may speak to Prawnathan and check out his wares. You can also find him back at theshop in the Lower Crustif you want to buy or sell items.
If you find the Sand Dollar Stowaway, you can equip it in the menu. It will prevent Kril from losing microplastics upon death. However, the item will vanish after you die.

What Items Are in the Prawn Shop?
Upon speaking to Prawnathan for the first time, he’ll have the following items in the shop:
Barbed Hook
50 MP
These things can let you reel in bad guys with your lil spear there. They’ll probably break after one use though, so buy a lot haha.
(10 ct) 450 MP
-
2000 MP
Stainless Relic
5000 MP
Use these to upgrade your fork at the armory in New Carcinia.
Bloodstar Limb (3 in stock)
2500 MP
Heartkelp Sprout
These heal Kril. Press the up button on the d-pad to use it.
Shark Egg (2 in stock)
You can respec your skills with these by going to the Moon Snail’s Domain.
999,999,999 MP