Sea life bounced back fast after the ‘mother of mass extinctions’
Oceans as an ecosystem are fascinating. This is simplified but on land the food chain is usually something like Plant-Herbivore-Predator but in the ocean the food chain is much longer, algae-Zooplankton--Predator-Predator-Predator-Predator-Predator-Predator-Predator. There's so much opportunities in the predator niche in the oceans that land animals keep going back to the ocean, because the evolutionary challenges were regularly worth it. This truly is a blue planet.