Hi ,
I got 4 and lost one.
Their the same species A. platensis as the most recent photo.
They are from South America with most in the trade originating from Argentina and like fast flowing streams . High oxygen ,fresh water , ph 7.5 , feed on insect lava but take most sinking foods . They live in little groups and breed quite easily, their mostly nocturnal .They dont tollerate warm water and should not be kept above 70. I've only the once seen them in England but they are more easily obtained in Germany. I've heard of white Aegla p. being available but havent heard of any other species other than A. p. coming onto the market.
All the best,
G. John