When mixing bihirs keep their size in mind ie. I wouldn't mix endi's with senegals
simply due to adult size difference.But most lower jaw species should be ok together as should most upper jaw species as long as they have enough room
Species and sizes
maximum known sizes often smaller in captivity
Upper Jaw Species-Upper jaw protrudes past lower jaw
P. palmas palmas ('palmas' bichir)- 13"
(subspecies)P. palmas polli ('marbled bichir)- 14"(there seems to be enough evidence to promote this to its own species)
(subspecies) P. palmas buettikoferi ('buettikoferi' bichir)- 13"
P. ornatipinnis ('ornate' bichir)- 27"
P. delhezi ('armoured' or 'delhez's' bichir)- 14"
P. senegalus senegalus ('Senegal' or 'Cuiver's' bichir)- 12"
(subspecies)P. senegalus meridionalis- 12"
P. retropinnis retropinnis ('retropinnis' bichir)- 14"
(subspecies)P. retropinnis lowei ('Lowe's' bichir)- 12"
P. weeksi ('week's' bichir)- 20"
P.teugelsi(new species not described yet)
E. calabaricus ('Ropefish')- 15"-30"
Lower Jaw Species-Lower protrudes past upper jaw
P. endlicheri endlicheri ('saddled' or 'red' bichir)- 32", possibly more
(subspecies)P. endlicheri congicus ('giant' or 'congo' bichir)- 39"
P. lapradei ('Lapradei' bichir)- 24"
P. bichir bichir-30+ ''
P.ansorgii*
Variations
There are variations of the above including
short bodied
longfinned
albinoism
leustic
albino Polypterids have a pink/ white body with red eyes if they are a species with pronounced markings
these are often yellowish in color.
Leustic (platinum) are silver/whitish bodies with black eyes.
*There are only 3 known examples to exist and they are in museums its possible
this species is extinct.
Have a link to a primer I did prolly more info on polypterids then you'll ever want to know
http://aquaticpredators.com/forums/index.php?showtopic=18771
