Groynes or break waters are usually man-made. Groynes often contain food options and also habitats for aquatic plants. When waves and currents hit the groynes, deep parts are created in their sides, and they can whirl food options up into the water column, which benefits the hunting predatory fish.
In deep water fishing spots, variety abounds – both in terms of fish and types of fishing. In summer, the deep water can be several degrees colder than the shallow, coastal water. This may attract predatory fish that prefer the cold water. In winter, a similar situation is in play, since the deep water is warmer than the surface water.
A coastal spot with varied bottom conditions is often a good place to find the fish. In different seasons of the year, the fish prefer different bottom conditions – depending on weather conditions and the presence of food options. For that reason, choosing spots with varied bottom conditions can prove effective, since you’re almost sure to find fish nearby.
Even though walking around on rocks along the coast may feel annoying, it’s often a good indicator of the presence of optimal bottom conditions for the sea trout and its food options. Everything from pebble to huge chunks of granite provides cover for sand hoppers, shrimp, and small fish. If there are waves, these food options are easily whirled up into the water column. A rocky bottom can be good all year round, but especially so during the cold months with few food options in the deeper water. A rocky bottom at a good depth also attracts other predatory fish such as cod and garfish.