A barrier built out into a body of water to protect a coast or harbor from the force of waves.
- In the 19th century the greatest engineering addition to the bay was the construction of Dun Laoghaire Harbour with its two-tiered breakwaters or piers and wonderful granite stonework.
- The installation of groynes, breakwaters, or protective sea walls has knock-on effects on the natural circulation of water and sediment in the near-shore environment.
- Big conger inhabit a number of environments, including deep water rock marks, harbours, jetties, piers, breakwaters and the odd sandy beach!
sea wall, jetty, barrier, mole, bulwark, groin, pier
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