the peacock is around 4 inchs
the moorei ciclid is and inch and a half
the jacobferbergi is close to 2 inches.
the only reason i put the jacobferbergi in the tank is because the morrei was freacking out when the eel was no where in sight. i tryed to see if is was because he was lonely and but the jacob in there and as soon as i put him in there they both seemed to be happy they are close to the same size and never get more than 2 inches apart. i know it is a small tank got an eel and ciclids but. they will be geting moved in to a biger tank here soon. i want to put the 2 ciclids in my ciclid tank.
and what i have found about peacock eels is that they burrow and they feed around dusk and like to eat adults will eat ghost shrimp, small live foods such as crustaceans, earthworms, fish, crickets, mealworms, blood worms, glass worms, brine shrimp and tubifex worms. insect larvae, small pellets, flakes. frozen blood worms, brine shrimp, beef heart, plankton and glass worms are also accepted.
i have tryed some of these and in the morning there are still a lot of food in the tank and it hasn't been touched... I don't want to leave food in the take because it will give it an amona spike. then that is a problem in it's self.
here are the like that i have found my info. (O:
http://filaman.uni-kiel.de/Summary/SpeciesSummary.cfm?genusname=Macrognathus&speciesname=siamensis
http://species.fishindex.com/species_2104macrognathus_aculeatus_spotted_spiny_eel.html
http://www.elmersaquarium.com/10eel_peacock.htm
http://www.giveusahome.co.uk/allpets/fish/peacockeel.htm