What are 'ancient' and 'prehistoric' fish that are still alive today?

  • We are currently upgrading MFK. thanks! -neo

Pyluper

Jack Dempsey
MFK Member
Nov 3, 2025
108
35
31
20
Thailand
As the title said, all I know are arowana, arapaima, aba aba knife fish, electric eels, tarpons, all true gars, lungfish, clown knife fish and that's all I know. If there are more ancient or prehistoric monster fish, please let me know.
 
  • Like
Reactions: tlindsey
Although not as ancients as Coelocanths or even Bichirs, i t is thought that some of the more ancient cichlids are the Etroplines of India, and Paretroplines of Madagascar.
Both have the most ancient swim bladder that acts as a hearing organ, attached to the skull, different than all other cichlids,
and the Etroplines seem to have a high tolerance for salinity, which suggests a transoceanic distribution.
1766077691155.png
Etroplus suratensus above, Paretroplus maculats and menerabmo below
1766077942066.png1766077834011.png
Paretroplus maculatus spawning below
1766078100198.png
 
  • Like
  • Wow
Reactions: tlindsey and HUKIT
Although not as ancients as Coelocanths or even Bichirs, i t is thought that some of the more ancient cichlids are the Etroplines of India, and Paretroplines of Madagascar.
Both have the most ancient swim bladder that acts as a hearing organ, attached to the skull, different than all other cichlids,
and the Etroplines seem to have a high tolerance for salinity, which suggests a transoceanic distribution.
View attachment 1570383
Etroplus suratensus above, Paretroplus maculats and menerabmo below
View attachment 1570385View attachment 1570384
Paretroplus maculatus spawning below
View attachment 1570386
I've always wanted to get a menarambo. I have a nearby fish shop that sells them at 3.5 inches, 8 US Dollars each.
 
  • Like
Reactions: tlindsey
$8 each is pretty amazing for a fish that is almost extinct in nature, and as a result is highly protected and no longer exported.
One caution, is they get rather large. mine easily hit 14¨(35 cms) and are a shoaling species, so my group of 6 easily and quickly out grew a 6 ft tank.
1766147337275.png1766147301328.png
If I were to rate fish, I´d say menerambo would be in my top 5 to keep.
Beside it, and P maculatus, I have also kept, kieneri, nourisatti, and dambabe
1766147650022.png1766147611614.png1766147673314.png
1766147784832.png
Both kieneri and Etroplus canarensis are smaller, so better suited to moderately sized aquariums
1766147884156.png

I kept E canarensis as a shoal in a tank as tiny as 55 gal
Image.jpeg
 
Last edited:
  • Like
Reactions: tlindsey
MonsterFishKeepers.com