A leptocephalus is the flat and transparent larva of the eel. (Photo by Uwe Kils) - larger image on http://www. ... (Photo by Uwe Kils) - larger image on http://www. ... A larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians). ... Families Suborder Anguilloidei Anguillidae (freshwater eels) Heterenchelyidae Moringuidae (worm eels) Xenocongridae (false morays) Muraenidae (moray eels) Myrocongridae Suborder Nemichthyoidei Nemichthyidae (snipe eels) Serrivomeridae (sawtooth snipe eels) Cyemidae (bobtail snipe eels) Suborder Congroidei Congridae (congers) Muraenesocidae (conger pikes) Nettastomatidae (witch eels) Nessorhamphidae (duckbilled eels) Derichthyidae (neck eels) Ophichthidae (snake eels) Macrocephenchelyidae...
It is also the generic name of Leptocephalus congroides, a congrid eel of the Red Sea and Indian Ocean. Genera many, see text Congridae is the family of conger and garden eels. ... Conshelf II in the Red Sea (Sudan) Location of the Red Sea The Red Sea (Arabic البØر الأØمر Baḥr al-Aḥmar, al-Baḥru l-’Aḥmar; Hebrew ×™× ×¡×•×£ Yam Suf; Tigrigna ቀá‹áˆ• ባሕሪ QeyH baHri) is a gulf or basin of the Indian Ocean between Africa and Asia. ...
Until 1893 a transparent, leaflike two-inch ocean creature was named as a separate species: Leptocephalus brevirostris (from the Greek leptocephalus meaning "thin- or flat-head").
But then, in the Mediterranean Sea, the Italian zoologist Giovanni Batista Grassi observed the transformation of a "Leptocephalus" into a round glasseel, and in Roscoff the French zoologist Yves Delage proved in a laboratory that both are the same species.
Nobody knows why, but beginning in the mid-1980s, the leptocephalus and glasseel arrival in the spring dropped drastically, in Germany to 10%, and in France to 14%, of their previous levels - as reported even by conservative opinions.
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