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fish

Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms.
Oceanic world. - Oceanic underwater world.
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Oceanic world.

Added 5 days ago by Grażyna

42

Caribbean. - Underwater life in the Caribbean.
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Caribbean.

Added 3 weeks ago by Grażyna

223 1

Underwater world. - Australia. Underwater world.
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Underwater world.

Added 3 weeks ago by Grażyna

198

Dolphins in the shoal - Dolphins enjoying dinner
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Dolphins in the shoal

Added 2 months ago by Makronos

14

Underwater world. - Coral reef. The underwater world.
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Underwater world.

Added 2 months ago by Grażyna

99 1

Whale shark. - Whale shark in the Maldives.
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Whale shark.

Added 2 months ago by Zeta

45

Underwater world. - Mysterious underwater landscape.
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Underwater world.

Added 3 months ago by Grażyna

145

Aquarium - colorful jigsaw puzzle
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Aquarium

Added 4 months ago by andi

25

Aquarium - colorful jigsaw puzzle.  The best puzzle zone wit animals.  The best puzzle zone wit animals.
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Aquarium

Added 4 months ago by andi

96 1

CORAL REEF - coral reef, colorful fish
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CORAL REEF

Added year ago by sandra

180

CORAL REEF - ocean, coral reef, marine fauna
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CORAL REEF

Added year ago by sandra

174 1

CORAL REEF - coral reef, underwater life, colorful fish
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CORAL REEF

Added year ago by sandra

258

CORAL REEF - coral reef, marine fauna, ocean,
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CORAL REEF

Added year ago by sandra

138

CHILDREN WITH WORTH - SUMMER FISHING FOR THE RIVER
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CHILDREN WITH WORTH

Added year ago by TED

32

something to eat - japanese cuisine fish
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something to eat

Added year ago by stachna

50

szczerbatek - blah blah blah blah blah blah blah blah blah blah blah
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szczerbatek

Added year ago by ania

25

szczerbatek - blah blah blah blah blah blah blah blah blah
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szczerbatek

Added year ago by ania

8

szczerbatek - vbnmofdpgshipgfsiofgweofhwedfmngdjgoghege
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szczerbatek

Added year ago by ania

11

Colorful fish - colorful fish puzzle
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Colorful fish

Added year ago by andi

94

Colorful fish - colorful aquarium puzzle
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Colorful fish

Added year ago by andi

38

Sharks 3 - shark sharks
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Sharks 3

Added year ago by ASK

26

Sharks 2 - shark sharks
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Sharks 2

Added year ago by ASK

20

shark tiger - shark tiger shark
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shark tiger

Added year ago by ASK

25

Aquarium - colorful fish in the aquarium
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Aquarium

Added year ago by andi

100

Life of the ocean - colorful jigsaw puzzle
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Life of the ocean

Added year ago by andi

36

Fighter - lorem ipsum dolor sit amet
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Fighter

Added year ago by Ayla

24

pokemon poplio - pokemon poplio is cool I like him very much because he is an extra pokemon
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pokemon poplio

Added year ago by poplio

48

Siamese fighter - Lorem ipsum dolor sit amet
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Siamese fighter

Added year ago by Ayla

17

Axolotl - Lorem ipsum dolor sit amet
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Axolotl

Added year ago by Ayla

17

Where is Nemo - Lorem ipsum dolor sit amet
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Where is Nemo

Added year ago by Ayla

53

Colorful trees - Colorful trees with poisonous frogs
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Colorful trees

Added year ago by Ayla

31

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

25

Underwater world - colorful puzzle jigsaw
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Underwater world

Added year ago by andi

68

Fishing - colorful fish puzzle
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Fishing

Added year ago by andi

69

Aquarium - colorful aquarium fish
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Aquarium

Added year ago by andi

80