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Habitat:
- Rocky Pacific Ocean Coastlines of North America

Behavior:
- Intelligent, playful, noisy barking, similar to a dog

External:
- Color ranges from chocolate brown to golden brown
- External ear flaps

Internal:
- Able to slow heart rate to breathe underwater for up to 10 minutes

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Otariidae
Genus: Zalophus
Species: Zalophus califorianus

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Habitat:
- Antarctica

Behavior:
- Aggressive

External:
- Named for its black-spotted coat
- Earless

Internal:
- Warm-blooded prey

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Phocidae
Genus: Hydrurga
Species: Hydrurga leptonyx

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Habitat:
- Remote Northwestern Hawaiian Islands

Behavior:
- Spends time hunting prey

External:
- Light, creamy coloration
- Backs become darker with age

Internal:
- Warm-blooded prey

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Phocidae
Genus: Neomonachus
Species: Neomonachus schauinslandi

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There are three types of pinnipeds including Otariidae (eared seals), Phocidae (earless seals), and Odobenidae (walruses).

Otariidae:
- Recognizable by their flippers and ears
- Unlike earless seals, they have external ear flaps
Phocidae:
- Sometimes referred to as "true seals"
- Have ear holes, no external ear flaps
- Have front flippers to navigate on land, along with their stomachs
- Move rear flippers back and forth like a fish to navigate in water
Odobenidae:
- Have tusks and vacuum-like mouths for eating shellfish on the ocean floor
- Air sacs in their neck to allow floatation
- Largest pinnipeds

External:
- Pinnipeds have 4 webbed flippers for swimming, navigating on land
- Spindle-shaped bodies
- Large eyes, developed whiskers for filtering certain water
- All pinnipeds have fur which occasionally sheds
- Insulated by blubber

Internal:
- Since pinnipeds are carnivores, they have modified molars for consuming prey whole
- Their sensory organs work in and out of water

Behavior:
- Carnivorous & predatory
- Subject to predation by examples such as killer whales

Habitat:
- Present in habitats ranging anywhere from ice to tropics, or coastal to open waters

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1. The type of speciation that occurred within this group is gradualism. These organisms haven't gone through short changes. They've seen evolution over a period of time, which represents gradual evolution

2. The type of evolution that occurred within these organisms is divergent evolution. Pinnipeds have evolved over time from a common ancestor which were land animals. These ancestors are described similar to bears and that they gradually adapted to living in water.

3. Nonrandom Mating -  Nonrandom mating occurs within pinnipeds because they look for specific characteristics when mating. Usually, the organisms will reproduce with one other specific organism.

4. Immigration & Emigration

- Some believe to migrate from France
- Originated in cool, northern climates

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Biochemistry:
- Proteins, carbohydrates, lipids in common: squalene and transcriptome for making proteins
Embryology:
- Offspring have around the same time of development period

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- Whiskers and ear flaps

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Evolution is shown in these groups of organisms through descent with modification because each organism has gained their specific traits through their ancestors and their offspring. Also, stabilizing selection is seen in these organisms by how each trait is balanced throughout the offspring of the organism.

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- Earless pinnipeds

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https://www.nationalgeographic.com/animals/mammals/l/leopard-seal/
https://seagrant.uaf.edu/marine-ed/mm/fieldguide/pinnipeds.html
http://www.marinemammalcenter.org/education/marine-mammal-information/pinnipeds/

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With the taxonomy of these three exemplary organisms, they are all classified the same up until their families.