In basin of the eastern Ionian Sea is the Gulf of Catania which covers 300 sq km. The gulf has a high level of productivity despite subjected to a strong anthropogenic impact. In areas with 10 to 100 m bathymetric, use of tool drift menaide prevails among local activities of small handicraft fisheries. During study an investigation on active marine fisheries in the gulf has been conducted, installing satellite devices on menaide vessels and getting information on pc of 273 fishing trips and 799 caught, through the SoftecoSismat software. From 1997 to 2010 were also made 446 surveys to define distribution area of a permanent population of bottlenose dolphins (Tursiops truncatus), covering over 9000 inm at sea. Data collected by Ketos researchers from boat include 94602 minutes of observation and 10519 minutes of sighting with 165 sighting events of Tursiops truncatus. Net menaide is a selective tool for fishing anchovies (Engraulis Encrasicholus) used throughout the year; equally bottlenose dolphin doesn't effect seasonal migrations and maintains an extensive presence in the gulf, although with greater concentration in the south area, Brucoli place. To locate and evaluate bottlenose dolphin habitat, GIS technology was applied storing data in ArcGIS database and comparing with fishing area. Results show full overlap of the areas and high rate of interaction of dolphins with fishing gear; they prefer to plunder anchovies from nets effecting an opportunistic predatory behaviour and causing huge damages both to the utensil and to the fished one, especially during summer months. Overlapping between action area of vessels and bottlenose dolphin hunting areal, combined with the high degree of intelligence of the species, supports the onset of feeding in net behavioural category, this requires action by local authorities in order to protect fishermen and ensure no persecution against particular conservation interest species like dolphins.