In the fight with Aquagoth, several Tentacles are positioned around it and lash out to strike the player when they come in range. The player should destroy them so they can focus on Aquagoth, and the tentacles supporting him on his main source of damage.
In the Junkyard, more Tentacles appear around the area, acting the same way as they did in the Aquagoth fight.
Tentacles, along with Tiny Tentacles, leave some of the most experience of any normal enemy. If the player is keen to level grind, this makes the Junkyard a good place. However, they award no money when killed, so if that is a concern the player should look elsewhere for grinding.