★ If any band should be performing 20,000 leagues under the sea it’s Mastodon; the sludge rock Ahabs behind 2004’s Moby Dick-themed Leviathan album, and a band who encase their diving bell-heavy music in inches of pressurised metal.
The closest they can come for this livestream, though, is the Georgia Aquarium, where a huge tank teeming with whale sharks, tropical fish and a “jerk” of a sea turtle forms the backdrop to a stripped-down set of rarely played tracks and less squid-scaring material. A full run through Leviathan, they tell us during interviews, “might have ruined the ecosystem”.