One final tip: THE BEST WAY TO FIGURE OUT WHAT COLOR TO USE IS: Test, experiment, and try. Get to know the body of water. Get to know the fish in the body of water. After a while, you will learn EXACTLY which colors the fish prefer.
The living sloths are omnivores. They may eat insects, small lizards, and carrion, but their diet consists mostly of buds, tender shoots, and leaves, mainly of Cecropia trees. They have made extraordinary adaptations to an arboreal browsing lifestyle.
Sloths live entirely in trees on a diet of leaves (making them folivores). And for this they are extremely rare. While most of the terrestrial world is covered in trees, there are very few vertebrates that call the canopy home.