help with decision
 

I wanted to get a eel for my tank it is a 26 gallon tank i have rock ,and everythings established i want a yellow headed moray eel the largest it gets is 13inches is it to big for my tank?

IMO, the eel won't be comfortable or thrive in a tank that size. Eels are great fish but need a proper environment to do well, like any other fish.

Maybe you were looking at the size they are normally sold at because the yellow headed moray gets just shy of 3 feet...

At most I'd put in a dwarf or chestnut moray.