Longfin zebra
A variant of Zebra danio (Danio rerio)
Representative Zebra daniophoto — a dedicated image of this exact morph isn't available yet.
A simple fin-elongation mutation giving flowing, trailing fins over the standard striped pattern.
Keeper tips for this variant
The long fins slow them down and tempt nippy tankmates, so house with calm companions and keep water clean to prevent fin rot on the trailing edges.