What exotic fish are these?

[kingkew]

I have attached 4 photos of the unknown fishes. Does anyone know their names? Am finding some exotic fish for my tank and have to do some research beforehand. Thank you

Cheers

[Trichopsis]

1. Licorice Gourami, probably the as-yet undescribed species from central Sumatra (Parosphromenus sp. 'Sentang')
http://www.seriouslyfish.com/species...us-sp-sentang/

2. Lyretail Killifish, possibly the ornamental 'gold' strain (Aphyosemion australe)
http://www.seriouslyfish.com/species...mion-australe/

3. Blackfin Pearlfish (Austrolebias nigripinnis)
https://austrolebiasproject.wordpres...-and-breeding/

4. African Banded Barb ('Barbus' fasciolatus)
http://www.seriouslyfish.com/species...s-fasciolatus/

I'm not sure if these species will do well if put together; I leave it to those with more experience in labyrinth fishes and killifishes to share their thoughts.