These also drop Beastmen's Seals as well. I was over in South Gustaberg, starting a lvl 1 RDM job from a lvl 50 BLM job, so my magic and combat stats (minus sword) are maxed on this lvl 1 job. I don't know if this affected anything or not.
Either way, I was suprised to see a Beastmen's Seals drop from such a low lvl mob.
When i first played, i didn't know how to heal so i attacked this mob, (9th mob non-stop) and i died... i was sent /tells saying "LMAO you suck!" i didn't even know how to heal that one time