Prejudicial bullying can fall under any of the other types of bullying but I think we need to take into consideration that it is its own form. Examples of this would be singling out and tormenting someone because:
their race is different that of the offender/s
they are gay, lesbian, bisexual, or transgender
that person's religion is different as well
their height, weight, hair color, or overall body is different from that of the offender/s
their likes/dislikes, interests, or hobbies are unusual to the "normal" person