Platypus

A mammal with features typical of reptiles: it lays eggs and has a cloaca.

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Domestic dog

Dogs are the domesticated subspecies of grey wolves.

Sponge

The most ancient group of animals, they live underwater, lack real tissues and body symmetry.

Pteranodon longiceps

A prehistoric flying reptile, similar to birds. However, there is no direct evolutionary...

Common bottlenose dolphin

Bottlenose dolphins are sea mammals which use ultrasound for orientation.

How do fish breathe?

Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.

Predation

Predators on top of the food chain prey on other animals. Their relationship is hunter and hunted.

The common clownfish

This species is an excellent example for symbiosis. Living together with sea anemones they keep...

The seahorse

The tiny predator of the oceans. Interestingly, the male seahorse carries the fertilized eggs in...

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