These are soooooooo valuable, you may not need them right away when first playing the game, but kill them and collect everything they drop anyways. Kill them when you dont need them, because eventually, you will, and if you dont, you'll regret it later. I go whole days trilobite hunting on my spino.
Best way to farm chitin from these guys: use a moschops. The moschops can collect around 200 chitin for one trilobite where as using an axe will give you around 80. Only downside, moschops can't get pearls or black pearls from them, so you'll have to collect those another way.
These are tameable for Pc Users, all you need to learn is the Fish Basket engram and drop one down near a high lvl trilobite and then stand in the trilo’s way and guide it til it’s near your basket then capture it, release it before it expires in your inventory then cryopod it up for save keepings! Trick no ones sharing is you can hide blueprints in abberation trilobites and then hide them underwater ;) p.s you can also tame leeches and then leave them on aggro for biowarfare at obelisks or transmitters lol or Sabre salmon then catch release then cryo them for easier otter taming or attaching c4 to said salmon then attacking underwater targets....
I once got 157 chitin from just one of these!! Definitely recommend going for these guys for chitin and oil, pearls (you get both) are just a bonus! They like to spawn around beachs and shallow rivers #Wolfs4Life ❤️❤️🐺❤️❤️ -Wolfa191