A defining feature for Rome’s climate, especially the western part of Rome, is the Tyrrhenian sea. The Tyrrhenian sea covers 106,000 square miles of the Mediterranean Sea and lines the western coast of Italy and the islands of Corsica, Sardinia and Sicily. It connects with the Ligurian Sea via the Tuscan Archipelago and connects with the Ionian Sea via the Strait of Messina. Some important ports of the Tyrrhenian sea include Civitavecchia, Pozzuoli, Naples, Salerno and Palermo. The Tyrrhenian sea creates a temperate climate in western Rome, experiencing warm dry summers and cool, wet winters. Parts of rome that are further inland and closer the the Apennine Mountain Range which experience a colder climate.The Tyrrhenian sea also features marine life such as jellyfish, crabs, orange polyps, feather dusters, moray eels, octopi and sea turtles. Commercial and sport fishing thrive in the Tyrrhenian sea as fish of many species are bountiful. Some of the most common kinds of fish in the Tyrrhenian are: swordfish, bluefin tuna, barracuda, sea bass, and grouper.
Source: Carole Bos, Tyrrhenian Sea-Map Locator, Website, https://www.awesomestories.com/asset/view/Tyrrhenian-Sea-Map-Locator (Accessed November 28, 2017)