Most Underrated Fish?

Neons, Harlequins, Celestial Pearl Danios and Dwarf Gouramis were all obvious choices when I considered stocking my tank. However, there are thousands of fish out there and I thought it would be interesting if people shared their opinions on what they think is the most underrated aquarium fish.

I went into my LFS expecting to walk out with a school of Rummynose Tetra or Harlequin Rasboras and I ended up with X-ray Tetra. Their tight schooling, beautiful fin tip colouration and see-through body has made them a firm favourite of mine.

What's your favourite underrated fish and why?   

Indian Glass Fish for me and not those hideous coloured ones.I've got 6 and they look amazing under a blue light.

There are a few fish with glass in the common name. The ones I've seen have been the glass catfish and I too have never seen Fiona's fish in shops.

The Glassfish is definitely one of those, actually including most smaller fish, that really does need to be kept in a shoal to look their best, as the photo shows. It's always a temptation for beginners to get a few of several different types of fish to give variety. but in a small tank shoals of one or two species usually look much better. It's like a flower garden, one each of dozens of different plants usually looks a mess whereas several of the same plant in a group or drift invariably looks better.

I think the Zebra danio is underrated, they are always lively and tough. I suspect that if they were rare and difficult to breed and keep, people would pay a lot for them. The more you have, the better they look.

Seriously Fish says about coloured Glassfish "protracted campaigning has seen them virtually removed from UK stores", but obviously not completely.