IGUANA: The American Sign Language (ASL) sign for "iguana"
 

One option for how to convey IGUANA is similar to the sign for LIZARD except with an "flat-O" handshape:

Sample sentence: IGUANA CAN SEE GOOD QM-wig? (Can iguanas see good?)

If you want to learn more animal signs, check out:

Notes: 

See: ANIMALS