Your welcome. I am so interested in creatures, that I like to study the biology behind them. My favorite part is classification. One interesting thing about the diversity of life is the trade-offs. A creature may be slow, but they can compensate with another strength. Plant and fungus based creatures make up by using food sources that don't require movement. Even some animals have the trade-off. They are slow, but they can defend themselves without running away. Skunk are a bit slow and awkward, but they have a stinky spray. Turtles and snails are really slow, but they are protected by a hard shell. Turtles even get to live for a long time. Sloths are notorious for being slow. They can eat the toughest plants in the rain-forest. It takes them a long time to digest it, so they make up with a low metabolism. Sloths protect themselves with camouflage and claws. The extreme is sea animals that stay put, but make a living off of filter feeding. These are things like coral, anemone, sea lilies, and barnacles. The opposite is the cheetah. It is the fastest land animal, and it chaises down its prey. The trade-off is that it is really weak and fragile. It can't fight back, if another large predator tries to steal its food.