wrote in message
oups.com...

Just had a thought... isn't it rather unusual to find a fish like this
in a harbour in Portugal? According to the Florida Museum of Natural
History website

http://www.flmnh.ufl.edu/fish/Galler...iggerfish.html

they are mostly found around America and only occasionally around the
med.


First of all it doesn't have be exactly the Gray Triggerfish. There are
numerous species of Triggerfish. But your description
came quite close to describing one, especially the top and bottom fins
waving alternately.
While triggerfish conjures up images of tropical fish as there are many
colorful ones in warm waters, in the U.S.
they can be found as far north as New York in the summer months.
I'm not sure why you would consider this fish unusual or in Portugal. In
Greece it is called gouroupsaro and Mih in Croatia.
The site you gave also gives the following common mames for the Gray
Triggerfish.
You'll note that there are French, Spanish, Italian names for it.

Common Names
English language common names include gray triggerfish, grey triggerfish,
filefish, leatherjacket, pig-faced, trigger-fish, triggerfish, common
triggerfish, and turbot. Other language common names include balista
(Rumanian), baliste (French), baliste cabri (French), ballesta (Spanish),
cachua (Spanish), cangulo (Portuguese), escopeta (Spanish), khanzyr
(Arabic), maracuguara (Portuguese), mola (Italian), mongarakawahagi
(Japanese), ndor (Wolof), peixe-mola (Portuguese), pejepuerco blanco
(Spanish), peje puerco (Spanish), penolera (Spanish), pesce palo (Italian),
pez ballesta (Spanish), porco (Portuguese), puerco (Spanish), roncon
(Spanish), sabaco (Spanish), schweinedruckerfisch (German), trekkervis
(Dutch), tryckarfisk (Swedish), and varraco (Spanish).