Anthropomorphic sea creatures and quirky science facts create a fantasy world for beginning readers.Vera, a mermaid with brown skin, dark pigtails, and purple scales, introduces readers to the residents of the underwater town of Tidal Grove, among them Beaker, part octopus and light-skinned with dark hair; Frond, brown-skinned with cornrows tied in a topknot and part jellyfish; and Cuttle, who has light skin and hair above a beige cuttlebone. Mr. Burbles, the Tidal Grove librarian, who is light-skinned and part frog, breaks the fourth wall to insert an unusual science fact on a "Did You Know?" page. That becomes the basis for the dilemma in the second chapter: Beaker's eight legs seem to want to operate independently. Finally, in the third chapter the friends work together to recover a large pearl from a sunken ship but get stuck in the process only to realize that working together is their best bet. Told primarily through dialogue, with color-coded speech bubbles, this beginning reader features simple, direct language, uncluttered but fanciful illustrations, and interesting problems for friends to overcome together. While the stories are somewhat predictable, with obvious lessons about the value of cooperation, youngsters still mastering their reading skills, especially those who like a blend of facts and fantasy, should find it appealing. (This book was reviewed digitally.)A sweet, undersea-set testament to the importance of teamwork. (Beginning reader. 5-7)