Well it does say "grappled" & that most likely the source of the grapple by a chuul.

Hey Lance, you can't stop me from studying on my free time away from the campaign...

But you cant tell people who don't know and if you don't know in the game then you can't use it.

Man, imagine this thing getting ahold of the squishy wizard with it's first pincer attack, the wizard failing the tentacle, and then getting hit by the second pincer attack while paralyzed.

I know what I'm filling this next catacombs with...

My understanding of how "it may also use this attack if X" is that it adds that attack to the multi attack function.

Ie., the Chull could pincer, grapple, justifying the conditions for tentacle, use tentacle, paralyze, then pincer again for an auto-crit at advantage. A dangerous combo, which should probably upscale it's CR if you ask me.

The Chuul, THE CHUUL!

Quote from eyeofspectator >>

ITS CTHULHU,KILL IT WITH FFFFFFFFFFFFFFFFFIIIIIIIIIIIIIIIIIIIIRRRRRRRRRRRRRRRRRRRRRRRRRREEEEEEEEEEEEEEEEEEEEEE

 Yees

Smash or pass

A hard smash with that many tentacles.

These are delicious with garlic butter.

Ima try to tame one

Essentially, this thing is a hybrid of a crab, Cthulu, and a praying mantis. The head is Cthulu, the pincers are the crab, and the body is the Mantis. And to answer anyone's question on how the Chuul holds those claws is similar to the Fiddler crab; it has a claw that is larger than its body and it carries it around just fine. 

oh jeez

Quote from nightlock_the_tabaxi >>

its friging aqwa mans son

 Aqua*

I like the idea that certain civilizations use Chuuls as gaurd dogs lol

I think this is pretty good, the only problem is that Skum seem to have more health than it. This isn't that much of a problem tbh as Chuuls get treasure and stuff for Aboleths (and their pincer paralysis thing is very interesting), while Skum's have a mindbreaking touch that definitely helps with the Aboleth's mind control charming thing. 

I guess Chuuls are better as guard dogs and treasure gatherers while Skum are more useful as direct bodyguards

Quote from imresaccount >>

imagine how heavy having pincers like that would be xD

 Imagine being so built the pincers don't feel heavy. o.O

Nope, whenever.

Quote from SuperParkourio >>

In this monster's multiattack, must it use its tentacles last?

Quote from the_less_then_good_hunter >>

Ha, I'll take it you've never seen a mind flayer.

Honestly mind flayers look more like Voldemort than Cthulhu, what with that face and how they hold their heads. I mean you examine them closely and there's not much resemblance on that end, but that's always what I've thought looking through the Monster Manual. Still, the only thing that makes them look like Cthulhu is the tentacles, otherwise they really don't.