Lessepsian /leɪˈsɛp.sɪ.ən/adjective 2noun 1forms 1 adjective2 •Of or relating to organisms that migrate from the Red Sea to the eastern Mediterranean Sea by means of the Suez Canal.However, while many necto-benthic and benthic Lessepsian fish are thriving, the inshore pelagic fish communities do not seem much affected by the dozen Lessepsian species inhabiting this area [...]. — 2007 •(no longer used, rare) Pertaining to the French diplomat Ferdinand de Lesseps, who designed the Suez Canal. noun1 •Any species that migrated in this manner. formsLessepsians
