One of the reasons why God made us was because He needed someone in all of creation who could appreciate His handiwork.
One of the things I see heaven as being is where every day God reveals some new wonder about Himself or His creation.
And one of the reasons he made these shrimp is that so we, someday, can learn about how these things work, and maybe use it to improve our vision or communication technology, or ...whatever. All these plants, animals, etc. serve a second (or third, etc.) purpose--they are like "easter eggs" or "secret codes" in video games waiting to be discovered.