Bottlenose Dolphins By: Maddy Russo


Description: light to dark gray over their dorsal surface, fading into a white/cream color along their ventral region, streamlined body form

Classification: Kingdom: animalia Phylum: chordata Class: mammalia Order: cetacea Family: delphinidae Genus Species: tursiops truncatus

Habitat Description: tropical waters

Geologic Time: about 50 million years ago

This is a Bottlenose Dolphin at Sea-World being trained to be in a show.

Morphological and Molecular Evidence

Orca: largest member of the dolphin family, live about 50-80 years in the wild, found in cold and costal waters, eats marine mammals, fish, seabirds and sharks

Whale: most common relative to dolphins, very large, stay in groups, very good parents to offspring animals

This is a graph like picture of the whole dolphin family and what mammals are like dolphins.

Orcas have 75% similarities to bottlenose dolphins and whales have about a 25% similarity to bottlenose dolphins.

Morphological and molecular evidence shows evidence for evolution of bottlenose dolphins because it shows how other mammals that we wouldn't think would be related to dolphins, actually are. It also helps explain and prove that orcas and dolphins could somehow mate.

Homologous Structures

Birds: a bird's wings are the same as a dolphins flippers because they use them the same way

Humans: we have a similar brain compared to dolphins and also the arms, our arms move the same way as a dolphin uses it's flippers

This is a homologous structure of animals that are similar to dolphins because of the bones that they have.

Homologous structures are comparing animals that have similar features.

Vestigial Structures

Transitional Fossils

Comparative Embryology


Created with images by ST33VO - "Bottlenose Dolphins" • Hans - "bottlenose dolphin dolphin tooth"

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