Related Experiment Video
Updated: Jul 8, 2026

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
Published on: July 20, 2017
Economidichthys mornosensis, a new freshwater sand-goby from Greece (Teleostei: Oxudercidae)
Jörg Freyhof1, Matthias F Geiger2, Stamatis Zogaris3
1Museum für Naturkunde; Leibniz Institute for Evolution and Biodiversity Science; 10115 Berlin; Germany. joerg.freyhof@mfn.berlin.
Abstract:
Economidichthys mornosensis, a new species, is described from the Mornos River delta in southwestern Greece. It is related to Economidichthys pygmaeus, from which it is distinguished by having a large black blotch on the first dorsal fin in males, a short perianal organ, and a scaleless back along the complete base of the second dorsal fin. Molecular data suggest that the new species can be distinguished from E. pygmaeus by a minimum K2P distance of 5.7 % in the mtDNA COI barcode region. Economidichthys mornosensis is endemic to a very small area, and potentially Critically Endangered.
Related Concept Videos
Osmoregulation in Fishes
Freshwater Microbial Ecology
Osmoregulation in Insects

