Hypancistrus and similar Plecos Hypancistrus/Panaquolus spp.
Looking more like a frog with a mermaid tail than a fish, this is one of the gold-striped Tiger Plecos, Hypancistrus spp.
At time of writing it is not yet fully described and assigned a species name. Others in the genus are also called Tigers.
There are several similar small plecos with bright gold stripes on dark or with black and white stripes. Many are called Tiger and Zebra.
Some are named and some have only a reference number and have yet to be fully described. All are native to their particular area
of a river basin in the northern half of South America.
Unsure whether the above is a juvenile of the Tiger Pleco above or a separate, related species.
Above is one of the King Tiger Plecos, Hypancistrus species, number L066, of the River Xingu in northern Brazil.
(L333, from the same area, is also called the King Tiger Pleco, but has a slightly different pattern, especially on the dorsal fin.)
Above is the Tiger Panaqolus, Panaqolus tankei, L398, of the lower Xingu River, Brazil.
Only recently described, it grows to some 13cm long.
The Striped Panaqolus, Panaqolus albivermis?, L204, also called Peru Striped Flash, is native
to Peru's Amazon tributaries. The stripes are white rather than yellow.
The striking Zebra Pleco, Hypancistrus zebra, (L046), is native to the Amazon's Xingu tributary in Brazil.
It grows to 7-8cm long. There is a curly-lined version, L098, a variant of the same species.