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Middle to Late Miocene (13 million years ago)

The sinking sea floor created a deep ocean where the Los Angeles Basin is today. The Laguna Hills sea floor was over a mile below sea level. Whales, dolphins, lantern fish, and sharks were common residents.

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Whale Barnacles
 
Great White Shark
 
Sculpin
   
Sea Turtle
 
Loon
 
Albatross
   
Booby
 
Dolphins
 
Desmostylus

  • Brachiopods
    • Glottidia albida
  • Mollusks
    • Delectopecten pechami
    • Anadara trilineata
  • Common Arthropods
    • Goose Neck Barnacle
    • Whale Barnacles
  • Sharks and Rays
    • Great White Shark
    • Bat Rays
    • Bonito Shark
    • Tiger Shark
  • Boney Fish
    • California Sheephead
    • Sculpin
    • Bathylagus Smelt
    • Rockfish
    • Lampanyctus Lantern Fish
    • Smilodonichthys Saber-Toothed Salmon
    • Porgy
    • Myctophids
    • Tuna
  • Reptiles
    • Sea Turtles
  • Birds
    • Praemancalla lagunensis (named for Laguna Hills) Flightless auk
    • Osteodontornis Bony "toothed"
    • Petrel
    • Loon
    • Albatross
    • Puffinus diatomicus Shearwater
    • Booby
    • Gannet
  • Marine Mammals
    • Allodesmus Large Sea Lion
    • Mysticeti Baleen Whales
    • Odontoceti Toothed Whales, Porpoises, and Proto-Dolphins
    • Primitive Fur Seals
    • Allodesmus Sea Lions
    • Desmostylus
    • Paleoparadoxia
    • Imagotarian Tuskless Walrus

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