Starlight Bristlenose Pleco (L-183 Ancistrus dolichopterus)
Size is about 1 - 1.5 inches or so. Great addition to your aquarium and a very striking appearance!
Full size for these gorgeous Plecos are around 6-6.5" or so.
Also known as the White Seam Pleco and previously labeled scientifically as Xenocara dolichoptera or Hypostoma punctatum.