Forum:Batman vs. Aquaman question

I've been commissioned by a professor of mine to find a particular comic where Batman fights Aquaman. All he could tell me of the story was that Batman fought Aquaman (or Sub-Mariner he said, but I'm just assuming he meant Aquaman), and afterwards washed up on a beach and crawled into a church where he found a cherub that cried blood. Judging by my professors age, it was probably from the 80's or even late 70's. I looked up summary's of all the Brave and the Bold issues that featured Aquaman listed in this Wiki but none of them seemed to fit his description.

Can anybody help me out?