amphioxi |
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| navigate by keyword : acrania amphioxus anatomy animal blind blister blood branchiae branchiostoma cephalochordata chordata cord description diagram education eyeless fish gills high illustration labels laboratory lancelet lanceolatum lancet model mysterious nerve notochord prehistoric primitive schematic scheme school schooling science scientific sightless structure unseeing vertebrate |
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| The lancelets, also known as amphioxi, comprise some thirty-two species of fish-like marine chordates with a global distribution in shallow temperate and tropical seas, usually found half-buried in sand. |
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