The Guardians make their way into the Quarantine Zone - a Junkyard full of old remnants of the war and a lot of pink goo.
After parcouring your way through the debris, you end up in a dark room on the targeted mining ship to catch a valuable monster.
It is hiding behind the cargo crates, so first destroy those to:
FORCE THE MONSTER OUT OF HINDING
FIND A WAY TO CAPTURE THE MONSTER
Look at the monster and aim at it.
Access the Star-Lord: Guardians Mode (L1 on Playstation - You can look it up in the Tutorials menu).
You should now get an outline of the monster (see screenshot).
Command Groot to use the ENTANGLE ability.