Definitely Ancistrus, either a female or immature male. Could be L213, heres an overview of the genus http://www.planetcatfish.com/catelog/genus.php?genus_id=4#221
Starlight ancistrus are also known as white seam plecos.convict84;3659353; said:ok i checked the list from where i got it,it is called a starlight ancistrus,thats all the info i can get,its around 1 year old to.