Karl Green said:
Depends on what you believe, but it seems so. The frog-fish dudes from Seeds of Destruction looked more frog like to me then Abe, and the crazy german's story to his grand-daughter as she was 'changing' they were some new race that would rule the 'New Earth'
no...
all I know of the "Frog Monsters" and Abe are they're completely seperate. Abe was found in a completely different situation. The only similarity is that Mignolia likes to draw frog/fish and tentacles. Here's some background info on the Frog Monsters:
In 1993, a party of explorers - Trevor Bruttenholm, the three sons of the Cavendish family, and Arctic explorer Sven Olafson - also arrived, and Rasputin awoke. He in turn awakened Sadu-Hem, and together they transformed all of the party except Bruttenholm into Frog Monsters. (that's 3 Cavendish men and Olafson).
Rasputin then magically dominated the rest of the expedition to use as porters to shift Sadu-Hem to their ship and to sail it to America. Sadu-Hem devoured the crew, along with victims in ports along the way, and drew further life energy from the lake under Cavendish Manor, where Rasputin hid it. However, when Rasputin was defeated by a BPRD team and the ghost of Elihu Cavendish, founder of the dynasty, Elizabeth Sherman unleashed her full pyrotechnic power against Sadu-Hem, which also caused Cavendish Manor to collapse on top of it. The BPRD believes that all this was enough to kill it; there is no evidence to the contrary.
Sadu-Hem and Rasputin transformed human beings into these creatures, to serve them as slaves. The transformation was not immediate, but took place when the servant needed raw power (such as on entering combat). Initially, the Frog Monsters may even have been able to transform back into human form, although eventually their monstrous natures took over completely. Nonetheless, they might or might not retain some fragments of their human nature and motivations; they were stronger if they lost all vestiges of humanity. They were completely subservient to Rasputin, unless remnants of their humanity distracted them. At least four Frog Monsters were created. Hellboy destroyed two; the others, who had some human impulses left, may still be in hiding somewhere.
Rudolf is one of these "other two".
It's the "monsterous nature" that Rudolf Cavendish fights, not fully able to transform back to human and hoping NOT to transform further into the Frog Monster.
While formerly subservient to Rasputin, he is no more and therefor not in control of Rudolf (for the moment)
Frog Monsters
Special Powers: These monsters are fully amphibious, equally fast on land and in water. Aside from striking with their clawed fists, they can attack with their long, prehensile tongues; any victim struck by this suffers fatigue loss and pain exactly as for Sadu-Hem's tentacles. Victims were left with distinctive circular scars all over their skin around where they were struck. Hellboy's Hand of Doom is immune to this effect, but most other forms of wearable or natural protection would probably be ineffective. The tongue can grapple and hold a victim like a tentacle as it drains energy.