Amphibians, Fish & Invertebrates

About Amphibians

Life on Earth is certainly diverse; over 2 billion species have been identified. To help organize all this biological diversity, animals with similar characteristics are grouped into classes. At Sunset Zoo we exhibit several animal classes including mammals, birds, fish, reptiles, amphibians, and invertebrates.

Amphibians are cold-blooded with a backbone and moist skin, however, unlike reptiles, they lack scales. The name amphibian means double life describing how these animals start their life in water and then undergo metamorphosis to live on land. Unable to regulate their heat, amphibians depend on warmth from the sun to become active.

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About Fish

Fish live in water and typically breathe through gills; they are the largest group of vertebrates and were the first backboned animals to appear on Earth. Fish are cold-blooded and use fins to swim. A fish’s age is determined by growth rings found on their scales or small bones in the inner ear, similar to the rings of a tree trunk.

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About Invertebrates

Invertebrates, as their name implies, have no backbone or vertebrae. They also share cold-blooded circulation, short life spans, and large numbers of offspring. While often forgotten, invertebrates represent roughly 95% of the animal kingdom.

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