In 2023, Schmidt Ocean Institute scientists exploring with ROV Subastian have discovered four new octopus species at a depth of ~3,000m off Costa Rica. The octopus were found near two low-temperature hydrothermal springs.
One has been named the Dorado Octopus after the rock called El Dorado Hill where it was found. The others have yet to be formally described.
Full article at: New Scientist 16jan24