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I thought it meant a species that has changed relatively little over a very long period of time, like Tuataras. Or am I wrong as well?
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Coelacanths are a Lazarus Taxon, not a living fossil.
Well, here's one of the modern species,
Latimeria spp.
And three extinct species,
Macropomoides orientalis, late Cretaceous;
Rhabdoderma elegans, late Carboniferous;
Allenypterus montanus, early Carboniferous;
linky (Clack, 2002)
Tuataras, like coelacanths they have two extant species of the same genus, and underwent significant differentiation in the mesozoic.
The photo is either not real or not living. They live in very deep water and die at the surface, and cannot be kept in captivity.