There are 69 different shells to collect in. When the game opens, the conflict starts, and one of the driving factors of the plot is that Kril has his Shell repossessed and longs to get it back.
From then on, Kril must travel the ocean, equipping anything he can find until he can earn his original Shell back. While Shells in are plentiful,many are specific to designated areas, with some also being available for purchase at Shellfish Desires in New Carcinia.
Each Shell has its own stats and abilities to aid Kril in his journey. While there are arguably some that are better than others, many of them can also be situational.
The Coconut Shell, while not one of the best overall shells, is one of the best early-game Shells players can obtain.
It can be found in the first area, The Shallows, more specifically in the Slacktide area. This Shell offers a defense of 35 with decent durability.