Select Common, German, or Scientific Name in the drop-down menues. "Search Galleries" will show the resulting pictures in the Galleries. For more details on the species selected you can directly access the WoRMS database of marine species or the Catalogue of Life by clicking the logos in the table.
You can also search the complete Family or even Order. However, this might result in a very large number of hits.

A short description of taxonomy and naming biological species you can find here.