This should keep it safe(ish) from the Chelicerate. Park the Seatruck underneath the Adult Ventgarden.It's a good idea to stay close to the seafloor while you travel towards the Ventgardens. You will hear a Chelicerate on your way.Start at the Delta Station Dock and head directly south for about 600 meters.The Deep Purple Vents is not an overly dangerous biome once you're past the Chelicerate.There are Spiral Plants dotted around the place, usually spawning at 250 meters to start, though more tend to spawn at around 310-320 meters.

Dive past it towards the Deep Purple Vents.

Keep heading into the Purple Vents biome until you find the next piece of the ship.

Head North-Northwest from the Stern of the Mercury II, the piece that's next to Delta Island.

You can kill it, but it takes a bit of work.

It has been known to roam around a bit, so if you don't see it on your way to the Vents, you might see it on your way back. There is a Chelicerate (that crab-claw Leviathan) that hovers towards the Northern side of the biome. Be careful heading towards the Purple Vents biome.You can't miss the Purple Vents: it's the biome with the vents that are purple. The easiest way to find this is to head South from your Drop Pod location until you find the Mercury II. Rather than tangle with the Ventgarden and its surrounding monsters, you can head to the Purple Vents biome. The biggest risks you'll face while hunting for Spiral Plants are the Chelicerates and having to dive deeper than you're able to. You will need the Survival Knife to actually harvest the Spiral Plant.Keep in mind that you only need six Spiral Plant clippings to craft all the Synthetic Fiber needed.Check out our list of best foods in the game. The Spiral Plant location is a bit of a mission from your Drop Pod location, though you may have a base closer by this point. The Seatruck Perimeter Defense Upgrade is extremely useful in both biomes, as there are sharks and Leviathans galore.At both locations (Purple Vents and Tree Spires), you can find Spiral Plants at a depth of around 250-300 meters, which is just about covered by that first upgrade. At least Depth Module Mark 1 for the Seatruck.Ideally, you're searching for Spiral Plant Clippings because you already have a Seatruck, the first Depth Upgrade, and other decent gear (like the larger O2 tank.) Here's what you need before starting the journey.

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