Whilst these are thought to be a commercial introduction the first known report comes from Holland so maybe Ruinemans had a shipment in around 2005.

Innidere is most likely not the correct spelling. It's thought it should be Idere (corrupted to caught In Idere maybe) which is situated north of Calabar on the route A4. A small road on the left at Betein goes towards Arochuku.
Roger Gladwell considered this population to be very similar to Ulf Hannerz's Port Harcourt collection in 1961. These were collected in the Wokocha River area. Scheel commented that this collection had 3 times more spots on the body than the Akure fish then collected.