1. A shark is _______.   a fish   a mammal   a bird   a reptile   an amphibian   Hint Half-n-half Clue   2. A _______ is a vertebrate.   jellyfish   herring   3. A toad is _______.   a bird   an amphibian   a mammal   a reptile   a fish   Half-n-half Clue   4. A _______ is cold-blooded.   polar bear   snake   5. A _______ is warm-blooded.   lizard   raven   6. A dolphin is _______.   an invertebrate   a vertebrate   7. An owl is _______.   a mammal   a bird   a fish   an amphibian   a reptile   Half-n-half Clue