Dododex
ARK: Survival Evolved & Ascended Companion
If you spawn in The Footpaw (selecting West Zone 2, or sometimes South Zone 1…

If you spawn in The Footpaw (selecting West Zone 2, or sometimes South Zone 1 in The Island map) you can easily find them in early game. Just look for the narrow peninsula in the East (a very safe place with almost no predators, literally none in the South area). You will frequently find trilobites on the southwestern coast.
Trilobites are very usefull, because they're passive and weak: that makes them probably the easiest source of chitin, a convenient source of meat and a source of oil and silica pearls, two important resources you'll need late in the game.
More Trilobite Utility Tips
On the left side of the island map, there is a bit that looks a bit like a crooked finger. First of all, you can wall off the part that connects it to the rest of the island and turn the entire finger into your base. It is extremely safe and the only predators there are ichthyornises and dilos. Second of all, at the part where it connects to the rest of the island, there is a small pond surrounded by rocks and in that pond a ton of trilobites spawn. I made my base on this finger and made a chitin farm with the pond. Do with this knowledge what you will.
These animals are ancient! And are believed( by some) to be related to the horseshoe crab. They look alike, in some ways! Trilobites were one of the first massive sea animals around ( back then, these were considered massive, due to life still getting the hang of making non- micro sized creatures.) but eventually went extinct by an apex predator that adapted to break their rough armor, and sadly that was the end.
— plastic bag