After the aquarium closes for the night, an adventurous octopus pushes out of its tank to visit neighbors, leaving the guard to clean up its mess. This engaging, anthropomorphic fantasy includes a short afterword referring not only to the relatively recent octopus escape from the National Aquarium of New Zealand, but to one in England in the 1870s and adding interesting facts about these aquarium stars. While on the lam, the titular Octopus (no gender) playfully threatens crabs and fish, splashes with penguins, steals the otters’ ball to bowl at the approaching guard, is almost caught by a shark, inks, hides, and hurries back to safe shelter in its tank before morning. The simple text (two or three words on a page) relies on cleverly chosen vocabulary, onomatopoeia, and rhyming active verbs—”Octopus peeks. / Octopus streaks. // Octopus smoosh! / Octopus whoosh!”—with other sound effects incorporated into the pictures. Dormer’s engaging illustrations, done in ink with digital color, employ a simple black line. Human skin tones vary; the guard has a greenish yellow face. The octopus’s eyes are correctly placed in its midsection along with an (imagined) expressive smile. Other sea creatures include a sea turtle parent and child who find the octopus antics as amusing as young readers and listeners will. Lighthearted entertainment just right for storytime.