The first few hours of development of 9 organisms

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  • By Tessa Montague


A movie of 9 organisms’ first day of development. From left to right (top to bottom):

Zebrafish (Danio rerio), a popular model organism for studying development

Sea urchin (Lytechinus variegatus), a spiky marine relative of the starfish

Black widow spider (Latrodectus mactans)

Tardigrade (Hypsibius dujardini), an eight-legged micro-animal that lives in water, mosses, and lichens

Sea squirt (Ciona intestinalis), an immobile, filter-feeding organism that lives on the ocean floor

Comb jelly (Ctenophore, Mnemiopsis leidyi), an ancient, water-dwelling invertebrate that looks like a tiny, transparent jellyfish

Parchment tube worm (Chaetopterus variopedatus), a spiny marine worm

Roundworm (Caenorhabditis elegans), a soil-dwelling worm, the first multicellular organism to have its genome sequenced, and a popular model for studying development

Slipper snail (Crepidula fornicate), a medium-sized sea snail

See the article here