The cat brain weighs about 30g.
167
Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
A 42-foot sperm whale has about 7 tons of oil in it.
209
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17