Here is a not so riddle for you to ponder..
It's a not-so-riddle cause it doesn't ryme..
Reading will make you wonder...
And figuring out what I am many take some time...
The first person to name me wins an invisible long travel sand rail!
I dig a pit in the sand...
The sides are a steep slip face...
I lay and wait buried at the bottom....
Once you stumble in you try to escape.....
Climbing the slip face I roost you causing you to slide back in....
It's to late when you realize there is no escape!
In your dismay I take hold of you with my fierce claws and drag you beneath the surface...
I inject my digestive toxins liquefying your innards...
I suck you dry and toss your exoskeleton....
Here I am again laying in wait for my next meal!
What am I??