If you have just started, you want to get your turtle some food. You start with 4 turtlecoins, so get something cheap, maybe? 

How to buy: Comment "I want to buy 'particular food' " and I will give it to you in exchange for the turtlecoins.

-Fish Rolls (3 turtlecoins)

-seaweed (1 turtlecoin)

-Squid soup (3 turtlecoins)

-Shrimp salad (2 turtlecoins)