Nautilus

Nautilus is a Legendary fish from The Depths and a good example of a mid-weight catch whose value comes from a decent price per kg. It needs Night Shrimp bait, Night, and the Spring or Summer seasons. The wiki describes an ancient, spiral-shelled mollusk with a glowing body.

It averages 60 kg and tops out at 168 kg, ranking 252nd of 663 fish by weight. At C$12.5 per kg, an average catch pays C$750, 355th of 742 documented fish, with 300 base XP. That puts it in the middle of the pack for value, not a standout.

Its rarity neighbors in The Depths are Ancient Eel and Small Spine Chimera, and the zone sells Rod Of The Depths and Onirifalx. Since the rods are local, you can gear up where the fish lives.

Verdict: a solid but unremarkable Legendary. Two seasons out of four are open, which makes it more forgiving than a one-season catch, and Night Shrimp is the only bait to carry. If you are exploring The Depths anyway, it is worth keeping; if you are comparing options for income, there are Legendary fish with better price per kg. Pick it for variety or for completing a set, not as a primary earner.