Ball pythons are nonvenomous constrictor snakes from West and Central Africa. They are also called royal pythons, and their common name comes from their habit of curling into a tight ball when stressed or frightened.

Bearded dragons are spiky-looking lizards from Australia. They are famous for puffing out a throat pouch that looks like a beard, basking in warm sunlight, and using body signals such as head bobbing and arm waving.

Betta fish are colorful freshwater fish from Southeast Asia. They are also called Siamese fighting fish and are famous for bright fins, air-breathing ability, bubble nests, and bold behavior, especially in males.

Corn snakes are colorful nonvenomous snakes from the southeastern and central United States. They are helpful rodent hunters, use constriction to catch prey, and lay eggs in warm hidden places.

Crested geckos are small climbing lizards from New Caledonia. They are also called eyelash geckos because of the fringed crests above their eyes, and they move through rainforest branches using sticky toe pads and jumping skills.

Discus fish are beautiful freshwater cichlids from Amazon River tributaries in South America. They are famous for round disk-shaped bodies, bright colors, gentle swimming, and unusual parental care where adults feed young with nourishing skin mucus.

Gerbils are small rodents that live in deserts, grasslands, and dry regions. They are known for long tails, strong back legs, burrowing skills, and social behavior with family groups.

Goldfish are freshwater fish in the carp family. They were domesticated in East Asia long ago and are now famous as aquarium and pond fish with orange, yellow, white, black, red, and patterned varieties.

Guppies are small colorful freshwater fish from northeastern South America and nearby islands. They are popular aquarium fish because they are active, bright, and live-bearing, which means females give birth to tiny swimming fry instead of laying eggs in the usual way.

Koi are colorful ornamental carp kept in freshwater ponds around the world. They are famous for beautiful patterns, calm swimming, large pond homes, and meanings linked with luck, friendship, peace, and perseverance in art and stories.

Leopard geckos are small spotted lizards from dry rocky places in parts of Asia. Unlike many geckos, they have movable eyelids, clawed toes instead of sticky pads, and thick tails that store fat for lean times.

Milk snakes are colorful nonvenomous snakes related to kingsnakes. Their red, black, white, yellow, or tan bands can make them look like coral snakes, but milk snakes are harmless to people when left alone and are helpful rodent hunters.

Neon tetras are tiny freshwater fish from South America. They are famous for their glowing blue-green side stripe and red coloring near the back of the body, which makes a school of neon tetras look like little lights in the water.

Oscar fish are bold freshwater cichlids from South America. They are popular aquarium fish known for strong bodies, expressive behavior, orange markings, and a dark eye-like spot near the tail that can help confuse predators.