Ants have tiny magnetic compasses in their antennae which help them navigate.
9
A group of unicorns is called a blessing.
304
Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Two dogs were among the Titanic survivors.
262
Sharks, like other fish, have their reproductive organs in their chests.
248
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6