Pearl danios (as mentioned by Bryon, though he uses a different Latin name from Seriously Fish)
www.seriouslyfish.com
I had a look and SF is here in error. As the details in the "Notes" section make obvious, this group of "danios" has been the subject of several studies during the past two decades, and by very reputable ichthyologists in this fish group. SF stops around 2012, and is correct up to that date. But in 2015 a major work (Kullander et al, 2015) reclassified the three "danio" genera into the single genus
Danio, with three divisions. Zhang et al, 2016 followed, and
Eschmeyer's Catalog of Fishes has
Danio as the valid accepted genus. It will be technical for many, but I cannot put it clearer, so here is the summation from this study (Kullander et al, 2015):
Phylogenetic analysis. The result of the phylogenetic analysis is summarized in Figure 7.
Danio is monophyletic (Bayesian posterior probability, BPP 1.00). Within
Danio, there is a trichotomy comprising the monophyletic chain danios (BPP 0.89), and two clades of non-chain danios. The first clade is
D. margaritatus (Roberts) +
D. feegradei (BPP 0.79), in the other clade (BPP 0.87)
D. albolineatus (Blyth) is the sister group to
D. kyathit Fang +
D. tinwini Kullander & Fang (BPP 0.69). The chain danios comprise two clades. In the first clade (BPP 0.66),
D. dangila is the sister of
D. meghalayensis + D. assamila (BPP 0.99). In the second clade (BPP 0.99)
D. concatenatus + D. sysphigmatus (BPP 1.00) are sister group to a clade comprising
D. catenatus + D. annulosus (BPP 1.00).
This (if it works) is a link to the Kullander paper:
This is a revision to SF I will likely leave alone, as changes to the genus are
very involved because of the electronic connections hither and yon, and the site owner has to do it, and it is a big job.