Nautilus jungle was one of my favorite positions when I first started playing League. He relied on using his shield instead of built-in sustain to avoid taking damage from jungle camps. But as jungle monsters have gotten harder and harder, and Nautilus shield has gone through various changes and nerfs, the popularity and viability of Nautilus jungle has dwindled into nothing.
Can this guy please get some love? He just can't compete with early-game skirmishers or other tanks that have %HP damage. It's a sad state where a champion with phenomenal ganks, good lockdown, and tankiness somehow isn't a viable jungler anymore. The scuttle changes have done nothing to help him out either.
(Graphs from https://www.leagueofgraphs.com/champions/stats/nautilus/jungle )