snake / ant.
The snake is long, the ant is short.
snail / turtle.
The snail is slower than the turtle.
hippo / koala.
The hippo is big, the koala is small.
giraffe / bear.
The giraffe is tall, the bear is short.
cheetah / cat.
The cheetah is faster than the cat.
shark / goldfish.
The shark is big, the goldfish is small.
gorilla / dog.
The gorilla is strong, the dog is weak.