section that begins at the gill covers and stops just before the second set of fins

larvae of frogs and toads

a gecko's transparent eye cover

an organ for obtaining oxygen from water

animals that regulate their body temperature by external means

a turtle's upper shell that covers its back

the type of snake movement used to move across sandy ground

prominent fin on top of a fish

animals with four legs

the organ used by snakes to detect scent molecules

the type of snake movement when a snake pushes its head forward using a coiled rear portion of his body as a brace, then pull its head part forward - like an accordian

fins located below the pectoral fins on the fish's underside; acts as rudders, paddles, or brakes

a "square" on a turtle's shell

the organ on a snake that is used to detect temperature

the type of snake movement in which the snake alternately stretches and shortens its body segments, allowing portions of its belly to rest on the ground, while other areas are lifted up and stretched forward

a system of nerve endings that extend over the fish's head and sides, allowing the fish to sense vibration and pressure changes

this group contains amphibians with long bodies and no limbs

color-changing cells that control a reptile's ability to change color

the type of snake movement when a snake follows an S shape and exerts force against surface irregularities