|This ostracod (seed shrimp) was stuck swimming in a pool formed atop a water lily. In general, they appear quite abundant, and this particular species/group are relatively large. That said, in the photograph to the left, there is a plant called Wolfiella next to the ostracod that is one of the smallest ‘macrophytes’ out here. In the other two photos you can see the legs or antenna the animal uses to propel itself.
I’ve collected many and may be able to say more about them in the future.