Depends on the shark. A 2 ft bamboo shark can turn around fine in a 6.5 ft width. A black tip or hammerhead would hit or get stressed trying not to hit.
Lol, i REALLY want a bamboo shark or one of the smaller cat sharks but i have NO experiance with saltwater.. Zoodiver, where do you recommend I start? I want to get a bit of practice before I get a bamboo shark... Is a snowflake eel a good first SW predator???
Dude that's way to small animals need space to stretch like black tips I see them on the reef while sieving there string and fast you need some space to move I think you would need like a Hugh 15,000 gal tank as a baby or giant pond