SWAMP THINGS VOICE?????

I just heard a Dick Durrock interview and that does not sound like the great voice swamp thing had in the movie, Also There is a scene where heather and swampie make love and ALEC HOLLAND can be seen after the eat a piece of swampie... who is playing Alec? theres no credit for him, he dosent look like durrock.

BASICALLY I WANNA KNOW Who plays him in part 2 voice of swamp thing and (Alec Holland.

really wanna know the voice though.