How do I get a shark to attack me when diving?

Shark attacks are indeed random. There doesn't seem to be a sure-fire way to get them to attack you. I've tried many ways to provoke an attack but could not find any pattern to it:

• Swimming out in the open water.
• Swimming directly at them.
• Swimming up to them from behind.
• Swimming below them.
• Swimming above them.
• Swimming with your back to them.
• Swimming near jellyfish.

No pattern, they'll attack when they feel like it. Just make yourself an easy target for them and hope that they'll actually attack you and not just take a bite.

If you're trying to complete the Abstergo challenge, it's best to find a school of sharks that are swimming near the diving bell. Try different diving locations until you find them. At least if you were unsuccessful getting them to attack you and you're low on health, you could always retreat to the bell to recover your health and oxygen.

I find the best way to do it is to swim with the shark, after he takes a nibble, follow him away. I've been doing that, and using that have gotten it to work most of the time.

not sure if its coincidence but i waited until i grabbed a shark's attention and then stopped swimming, faced the shark and repeatedly pressed the B(counter) button as the shark approached. using this method i was able to get the same shark to attack me 4 times within 5 minutes