For anons that are wondering, 69 american alligators is approximately 9.85 giraffes, based on the median mass of the giraffe, because there are at least four kinds of giraffes which are as of yet unspecified.
for decennatherium rex, 8.86
also my previous calculation was mistakenly against the upper end of the giraffe scale, so the actual median for a normal giraffe was 6.96