A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The seahorse is the only fish to have a neck.
12
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
Sheep, goats, octopuses, and toads have rectangular pupils.
7