half banded and zebra spiney eel
http://www.brooklands.co.nz/tropical/zebra_eel.htm
would be the smallest
peacock eel would be next
then fire eel and tyre track
i will try too count them if they sit still
i have 5 different species in there (no chance of hybridisation as eggs are gone as soon as they spawn !)
4 ft tank
also GBA , Elephant nose , and baby Ctenopoma
Rainbows are the main attraction 8)