Zahlreiche massiven quadratischen Säulen befinden sich ca. 600 m von der Küste bei Lucrino. Sie bestehen aus einer Kombination von römischen Mauerwerk, insbesondere opus reticulatum, und aufgrund their position, have probably provided protection for Portus Julius.
Their heights range from the seabed at a depth of 16m up to several meters below sea level. They offer some protection against prevailing currents, and different lighting conditions. This leads to the conclusion that their upper edges are covered with algae, which, however, gradually decreases with increasing depth, so that at the foot of the pillars, a typical Mediterranean surrounding areas. This spectacular combination provides a unique habitat for a variety of organisms that have adapted to shallow waters than those in which they would normally remain. Not only on the columns themselves, but also between them, where fallen rocks are found, many different species of fish and all marine species have found refuge. to come
To return to the name of the dive site, the emphasis must be placed here on the geological aspect - are plentiful and active fumaroles testify to the volcanic origin of this area. These fumaroles are wells of gas bubbles escaping from the ocean floor (at temperatures higher than ambient temperature) and leave traces of sulfur, which the surrounding sea floor, a white fluffy appearance awards.
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