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Kryptopterus are Southeast Asian, so it is more likely to be Pseudeutropius (probably P. brachypopterus).

However, the contamination probably occurred at the transshiper [if only because many Pseudeutropius come from Sumatra or Borneo, where to my experience. K. minor is either never (Sumatra] or very seldom (Borneo)] exported], so there is a very small chance that a mixture from an Indian shipment occurred.

The best way to tell would be to look at the maxillary barbels. They should reach at least the pelvic fins in N. atherinoides, and only to the level of the dorsal origin for P. brachypopterus. The number of anal-fin rays should also help if it is P. moolenburghae, as this species has more (42-49) than any other you are likely to encounter.

Pseudeutropius brachypopterus is a lot more commonly encountered than P. moolenburghae (although the two species form mixed schools in the wild). These are jittery fish, more so than glass cats, and they need a heavily planted tank to feel comfortable.

In the wild, they are usually associated with brown water habitats. Ideal tankmates would include small barbs (e.g. Puntius hexazona) or rasborines (e.g. Boraras).

If you put Pseudeutropius and Neotropius together, they might school, but chances are equally likely they might not, since they come from very geographically disparate areas.

Bear in mind that Pseudeutropius, especially P. moolenburghae also has a body pattern very similar to that of Neotropius, as this picture of P. moolenburghae shows:

I may very well have P.moolenbughae in that case.. Definately more likely as far as distribution goes.

You'll surely find me trying to get a good shot of a live one for everybody!

I'll admit I haven't exactly covered myself with glory on these.....

bought 6 (they didn't have more); lost 2, and the remaining 4 aren't doing fine at all.
they're in a planted tank with Corydoras, Rasbora, several other small cats and 2 gentle cichlids that ignore them.
But these are like Hassar; afraid of ANYTHING.

they don't feed well (I tried live artemia-larvae, cyclops, daphnia, black mosquitolarvae, flake, powederfood etc); the water is nice and yellow due to peat-granules; the temp is about 24-25'C.....

We have Neotropius atherinoides and Pseudeutropius brachypopterus in the same tank. They do NOT school together.

No problem feeding them. They all eat freeze dried bloodworms, even earthworm flakes, not to mention frozen and live foods. In our experience, both species are best kept in heavily planted tanks, with enough cover that you rarely get to see them.

The coloration and markings on both species we have varies with tank background and fish mood.

Dinyar

IME, P. moolenburghae are more delicate than P. brachypopterus.

After keeping this fish for over a year now, I just had to mention that the fish looks even more like at it's current size of only 6cmSL. I can't offer up an exact number, but I did my best to count the anal fin rays (several times, my eyes hurt!) and with certainty I can at least say there's only 38-40. Also the fish still possesses the irridescent patch on top of it's head, and the stripe placement is a perfect match for N.acutirostris.

Sorry for the lack of pics after all this time, but the new species of Pseudeutropius added to the E-log reminded me of this thread and to look it all over again. I wouldn've taken a few just now, but the charging cord for our ancient digicam has been missing for the last month now!

So what's the likelihood of N.acutirostris making it into the hobby? I see from the E-log that Ian had or seen at least one anyway..

So what's the likelihood of N.acutirostris making it into the hobby?

Well, it is exported as an aquarium fish (though less commonly available than Pseudeutropius).