Agree with Lija in that the Tanzania morph (not a described species yet) does grow large with males reaching 7 in. According to Vosjoli P. and Mailloux R. (2012) Giant African Bullfrogs Life History and Captive Husbandry. Advanced Visions, Inc., CA USA.; Tanzania ABFs froglets have a zig-zag patterned dorsal line while the pics provided show a straight line.

If not a Giant, maybe it's a P. angusticeps from Mozambique (http://www.frogforum.net/african-bul...us-status.html).