Sources

We are thankful, for the informations and pictures we have used, to:

Italy

"Acquario Marino Mediterraneo" (www.aiam.info), "European Environmental Agency"(www.eea.eu.int) photographer Carlo Ravenna (info@ottiolu.net) and to the responsables of the sites www.eurocbc.org, www.gol.grosseto.it, , www.gastropods.com, www.lamaddalena.it , www.graphicmaps.com

We asked them permission.

Endangered and Threatened Species Recovery Program
www.npwrc.usgs.gov/resource/distr/others/recoprog/states/species/dermcorp.htm
Endangered and Threatened Species Fact Sheets
caribbean-ecoteam.fws.gov/animals_FS.htm