Can a seal walrus or penguin breathe the longest underwater?

Among the three, the walrus can hold its breath the longest underwater, typically for about 30 minutes, although some can manage even longer. In comparison, seals can hold their breath for around 20 minutes, while most penguins can dive for about 5 to 20 minutes depending on the species. Their adaptations for diving and hunting vary, but walruses generally have the longest breath-holding capability.