Cells embedded in a mass of spherical jelly, with whip-like flagella pointing outwards
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Colony very large (may be visible to naked eye) and hollow, often with daughter colonies visible within the large parental colony; cells have eyespots of varying size within the colony.
Volvox -
Colonies small, up to approx. 32 cells set in a sphere of mucilage.
Pandorina -
Colonies small but with a hollow centre, with cells set around the outside.
Eudorina