- ...that a polydactyl cat (pictured) is a cat that has more than the usual number of toes on one or all of its paws?
- ...that Unsinkable Sam was a ship's cat of both the Kriegsmarine and Royal Navy during the Second World War who survived the sinking of all three ships on which he served?
- ...that Able Seaman Just Nuisance is the only dog to have been officially enlisted in the Royal Navy?
- ...that the Moscow Water Dog, developed as a water rescue dog, preferred to bite drowning people instead of saving them?
- ...from its discovery by John Edward Gray in 1850 until a re-assessment in 1981, the Clymene Dolphin was regarded as sub-species of the Spinner Dolphin.
- ...the Australian Snubfin Dolphin (Orcaella heinsohni) is a recently recognised species of dolphin first described in 2005.