What is this mystery worm???

[MrsNoggin]

So in my daughter's (translate as 'mine') mealworm colony / science project / odd pet collection we found this weirdo... not sure if it's just a very big very dark mealie, or a baby morio. Any ideas anyone?

By the way, I'm talking about the MEDIUM ONE pictured with a normal fully grown mealworm (generation all trying to pupate) and a morio for reference. I'd like to know which tub to put it in! Plus we're curious - never seen a mealie get that big or dark. We did add a small tub of mealworms to bolster numbers a couple of weeks ago - I'm assuming that's when this weirdo snuck in.

 

[CooperDragon]

I'm not certain but the middle one does look like a morio worm to me based on the pale color and dark ends. I believe mealworms tend to stay relatively lighter in color.

 

[kingofnobbys]

Big worm is a superworm. The smallest is a mealworm, the other worm with a dark rear end is also I believe a superworm (only it's not full grown).

 

[Seagarbage]

To me it looks like all three are superworms, a full-sized one plus two smaller ones, one of which has just shed its exoskeleton to get bigger. If you only intentionally bought "mealworms", my guess is that you actually just bought superworms which look very similar.