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