no...P. endli endli and P. endli congicus are two different subspecies...
the official record of largest bichir belongs to P. endli congicus. Theres anecdotal evidence that P. bichir bichir gets larger, but it hasn't been officially recorded or backed up. i think its safe to say that endli. congicus and bichir bichir are among the largest.
ansorgii also gets big, potentially as big as congicus and bichir bichir, but its not clear since theres no record or anecdotal evidence to suggest that yet. but from specimens caught it would seem that ansorgii gets bigger than endli endli and bichir lapradei.
heres a list from anne's primer (i updated/edited a few of the sizes)
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"
(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"
(possible subspecies)P. senegalus meridionalis- 12"+
There is, Also the possibility of a third member of the Polypterus senegalus
group that is found in the Nile River
P. retropinnis ('retropinnis' bichir)- 12"-13"
P .mokelembembe
P. weeksi ('week's' bichir)- 20"
P.teugelsi (found only in the Cross river)-20'' (as of now)
E. calabaricus ('Ropefish')- 15"-30" (Closer to 15''-20'' in captivity)
Lower Jaw Species-Lower protrudes past upper jaw
P. endlicheri endlicheri ('saddled' or 'red' bichir)- 30", possibly more
(subspecies)P. endlicheri congicus ('giant' or 'congo' bichir)- 39"
P. Bichir lapradei ('Lapradei' bichir)- 24"
P. bichir bichir-30+ ''
P.ansorgii
