Underwater Counting Even Numbers Author:Jerry Pallotta, David Biedrzycki (Illustrator) Count from zero to fifty by even numbers and learn why the Green Moray Eel is green (yellow slime covers its blue body), how much a Manta Ray can weigh (up to a ton and a half), which fish has blue teeth (a Harlequin Tusk Fish), and more. The underwater world awaits you, so dive into this learning adventure!