Possible Clues:

• Arboreal amphibian
• Arboreal croaker
• High hopper where it's green
• Forget somehow to describe extremely rare amphibian
• French turn up supporting pedigree amphibian!
• Amphibian has to walk laboriously about coral structure
• Amphibian cave-dweller briefly crossing coral ridge
• Lumber round rocks with climber and swimmer
• Caveman gathering row of rocks uncovers amphibian
• Noisy amphibian