The Crucifix Catfish
by Allan James
First published in the newsletter of the Greenock and
District Aquarist Society (Scotland), and www.scotcat.com
Aquarticles
This is a brief look into how Arius proops, one of the many sea
catfishes in this genus, received the common name of the "Crucifix Catfish."

Arius proops
First of all we need to familiarise ourselves with the family and the genus concerned. Arius
proops from the family Ariidae is as far as I know a synonym, and the
correct scientific name for this fish is Hexanematichthys proops. I have still to
find a source for the name change as I know that Hexanematichthys is a synonym of
some Arius species and there is a few discrepancies as far as this genus is
concerned. Ariidae is the only family that is found worldwide from the
Australasian continent to the South American continent and they can be found in marine,
brackish or freshwater. Our subject resides on the North Eastern tip of South America from
Colombia round the coast to Venezuela and the Caribbean and down the Atlantic side of
South America bordering Brazil, Surinam, Guyana and French Guiana. For our in-depth look
at proops we will stick to the "old" name of Arius.
The scientific name of Arius is derived from the Greek word Apelos
(pronounced Araios) which means "sanctified by the god of war", and refers to
the bony structure extending from the skull covering to the powerful thorn of the first
dorsal fin ray.

The powerful thorn of the first dorsal fin ray
The underside of the skull covering has a bony structure which can be seen when all the
flesh and soft parts are removed. It then looks like a crucifix or like a painting of
Christ crucified, and is surrounded by a Weberian bone in form of a halo. The upper rough
part of the skull roof which is also visible on the living fish, looks like a monk with a
cowl and hood and his arms outstretched in prayer. Others see this as a Roman soldier with
armour on his chest and the dorsal fin spine is the lance which he opened up Christ's
side.

The head
The Crucifix catfish was first reported in a travel report in 1789 and today you can
see in the Market places in the ports of these South American countries with the bony
structure laid out with Christian symbols painted on them.
The pictures depicted in this article are from Ann & Danny Blundell's trip to the
Margarita Islands just off the North Coast of Venezuela and a popular destination for
tourists from the United Kingdom. I am indebted to Danny who took these pictures and who
is himself a very accomplished photographer, and Treasurer of the Catfish Study Group
(U.K), along with Ann who carries out her duties as Secretary of the group.
These images are all the Copyright of D.Blundell except for the map of Venezuela:

Island of Margarita off the coast of Venezuela

Specimen showing the bony structure, in the Museum on the Island of
Margarita

The same specimen showing the full skeletal body

Showing the spiny first dorsal ray and vertebrae
Reference: Grzmeck's Animal Life Encyclopedia Volume 4 Fishes 1, 1963
© ScotCat 2003
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