Aziraphale and Crowley swam underwater towards Gabriel and Beelzebub's boat. Once they were about 10 feet away from the boat, they looked at each other and nodded. They were ready to put their plan into action.

Gabriel and Beelzebub were fishing with regular old fishing poles. Nobody had taught either of them about deep sea fishing, or using nets. 

"Bee," said Gabriel. 

"What izzzzz it?" Beelzebub said with a hint of annoyance in their voice.

"We have been sitting here for hours, and we haven't caught anything. Don't you think that it's about time we give up? We could... go for a jog or something instead."

"How dare you doubt me!" Beelzebub snapped.

It was at this moment that Crowley grabbed Beelzebub's fishing line, and Aziraphale grabbed Gabriel's fishing line. The pair yanked on the fishing lines with all of their might.

"Beelzebub!" shouted Gabriel as he struggled to reel in his catch. "I've got something!"

"Azzz have I!" exclaimed Beelzebub, also attempting to reel in whatever it was they had caught.

Crowley and Aziraphale let go of the fishing lines. Gabriel and Beelzebub finished reeling in their lines, but came up empty-handed. A confused Gabriel and Beelzebub exchanged glances.

"Where did it go?" Gabriel asked.

"Bring it back!" demanded Beelzebub.

Crowley and Aziraphale snickered and high-fived each other. Gabriel and Beelzebub re-cast their fishing lines. Crowley and Aziraphale waited a few seconds before grabbing onto the lines once more. They both tugged hard.

"It's back!" shouted Gabriel.

"Quick, reel it in!" Beelzebub screamed. Gabriel and Beelzebub frantically attempted to reel in their fishing lines, but to no avail. Whatever it was they had caught was too heavy.

Crowley and Aziraphale decided to put the other part of their plan into action. They began swimming as quickly as they could, still holding onto the fishing lines, and dragging Gabriel and Beelzebub's boat behind them.

"It's moving the boat!" Gabriel screamed.

"I can zzzsee that!" Beelzebub screeched.

"Whatever it is we caught, it must be huge!" Gabriel shouted.

"Zzzstop zzstating the obviouzzz!" Beelzebub shrieked.

Aziraphale and Crowley swam so fast that Gabriel and Beelzebub tumbled over onto each other. They clutched onto each other for dear life and screamed.

After about a half an hour of messing with (torturing) Gabriel and Beelzebub, Aziraphale and Crowley left the little boat right back where it had started. 

Aziraphale and Crowley smiled at each other and at a job well done.