The agency plans to promote the park's animals and its conservation projects, thus distinguishing it from other Tussauds Group-owned theme parks Thorpe Park and Alton Towers.
But Diary suspects the Chessington PR team might have taken the animal side of the brief too seriously - as well as Blue Zebra, the shortlist included Starfish Communications and Cow PR.
Diary wonders at the length of the original pitch-list. Did Rooster battle it out with 3 Monkeys and Midlands-based Armadillo? And what about The Fish Can Sing, Babel Fish PR, Octopus and Seal Communications?
If any aquaria are hosting pitches, we reckon your selection process just got easier.