Unfortunately this issue of aqua came out delayed because of late per review papers arrives. We are sorry for this exceptionally delayed issue of our journal. Volume 23, Issue 2 – 28 April 2017 New Scientific publication – started delivery on April 28, 2017 Full Text | PDF (2,6 MB)

Cleaner wrasses of the genus Labroides are the epitome of a cleaner fish. Herein we describe two cleaner wrasse species, Labroides bicolor and Labroides dimidiatus, displaying a behaviour known as chafing or flashing. When chafing, a fish rubs itself against sandy bottoms, rocks, vessels, or other rough surfaces including sea

Two new species of the genus Melanorivulus are described, both belonging to the Melanorivulus zygonectes species group. Melanorivulus canesi n. sp. is found at a tributary of the middle Rio Xingu basin, Pará, state of Brazil. It differs from the other species of the Melanorivulus zygonectes species group by its