A guide to coral reefs offers an informative tour of this active environment while examining its diverse residence, plant life, make-up, eating habits, and unique characteristics. Interest Level: K-3 Reading Level: 4.5 ATOS Book Level: 5.5 AR Interest Level: LG AR Points: .5 AR Quiz: 117606EN Reading Counts Level: 5.7 Reading Counts Points: 3 Lexile Measure: 920 Lexile Code: IG (Illustrated Guide) Guided Reading Level: P Fountas & Pinnell: P.