1. A _______ is warm-blooded.   lizard   raven   2. An owl is _______.   an amphibian   a mammal   a bird   a reptile   a fish   Hint Half-n-half Clue   3. A dolphin is _______.   an invertebrate   a vertebrate   4. A _______ is a fish.   lizard   sardine   dove   frog   horse   Half-n-half Clue   5. A shark is _______.   a mammal   a bird   an amphibian   a reptile   a fish   Half-n-half Clue   6. A _______ is a vertebrate.   jellyfish   herring   7. A spider is _______.   a vertebrate   an invertebrate