No, celestial pearl danios are not fin-nippers. Danios may have a reputation for being fin-nippers, but this only happens when they’re kept in small tanks in small numbers, leading to low mental stimulation.
If you keep at least five or six celestial pearl danios in a large community tank, they’ll leave their tankmates’ fins alone.
Celestial pearl danios may exhibit rare bouts of fin-nipping when housed with long-finned tankmates, but this shouldn’t be a cause for concern. These fish have small mouths, so they’re unlikely to cause any lasting damage. Plus, they’re generally shy and docile and will spend more time hiding from other species than chasing and nipping their fins.