Blackfish review

It's saying something that the huge whale cock on display isn’t the most shocking thing about Gabriela Cowperthwaite’s scary but sensitive doc.

Presented as the real-life stuff of murder-mysteries, the three deaths caused by SeaWorld’s Tilikum the killer whale horrify.

But Cowperthwaite dives deeper, unravelling the shocking thesis that captivity’s multiple traumas may have made Tilly a monster.

Like a more obvious underwater twist on Herzog’s Grizzly Man, Blackfish presents a persuasive, passionate argument: wild nature’s right to freedom demands respect, cock and all.