This snail has a solid, smooth shell, which is a uniform black colour. However, older or eroded individuals may be white at the peak of the shell. The opening (aperture) is thick and white, except for a black line around the outer edge. The door (operculum) is solid, semi circular and covered with small lumps. The colour is orange-tan with black lines.
This species can be confused with the Western Black Nerita as both look similar the key difference being the operculum see the pictures below.
How to identify Nerita melanotragus?
What habitats does Nerita melanotragus live in?
Lives intertidally on rocks
What is the distribution of Nerita melanotragus?
Eastern Australia from QLD to Tasmania
How big does Nerita melanotragus grow?
Can grow to around 25mm
Disclaimer: A lot of work goes into trying to identify and ensure accurate identifications are made and that the listed Descriptions, Sizes, Habitats and Distribution information is as accurate and valid as possible. Unfortunately, information in this arena is ever changing and as such no guarantee can be offered that it is correct or currently valid as a result the information is provided as a guide, and it is always suggested that you do a little research to ensure you have the latest and most accurate information. View the reference's or bibliography I welcome any feedback and comments on the information provided.