This printable crossword puzzle on the topic of Ecology & Evolution has 11 clues. Answers range from 4 to 14 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
a fish with both of its eyes on one side of its head
the breathing organs of most water animals
the organ that lets a fish stay at one level in the water without sinking
hagfish and lampreys are the only two types of ____fish
sharks and rays are ___fish
the majority of fish in the world are ___fish
a ___must continue swimming to stay afloat
cold-blooded animals that breathe air and have dry, scaly coverings
the process of shedding the outer layer of skin
the fastest known snake is the African black ___
a special scent organ located on the roof of the snake's mouth