El Templo is a deep reef site located off the coast of Mataro, Spain. The reef structure extends from 25 to 35 metres, requiring advanced diving skills and careful gas management. Divers should maintain solid buoyancy control while navigating the rocky substrate. Visibility varies significantly, ranging from 6 to 21 metres depending on conditions. Water temperatures fluctuate between 13 and 20 degrees Celsius throughout the year, making appropriate thermal protection essential. Access to this site is strictly by boat, and divers must monitor bottom time and decompression requirements closely due to the significant depth. The site is best suited for experienced divers comfortable with deep-water environments.

Plaer del Vell is a reef site located off Mataro, Spain, accessible exclusively by boat. The reef structure extends from the surface to a maximum depth of 24 metres, allowing divers to select a depth profile suited to their experience level. Conditions are generally mild, with currents typically remaining light. Due to the nature of the site, divers must maintain awareness of boat traffic during surface intervals and ascents. The site is suitable for beginners, though constant monitoring of depth gauges is necessary given the reef topography. Water temperatures fluctuate seasonally between 13 and 23 degrees Celsius.

Los Islotes is a reef and pinnacle site located 2000 metres off the coast of Mataro, Spain. Designed for advanced divers, the site features depths between 19 and 24 metres. The topography consists of rocky terrain requiring precise buoyancy control to avoid sharp coral and rocks. Divers should be prepared for mild currents, though surge and swell can occasionally increase the challenge. Visibility is highly variable, ranging from 5 to 30 metres depending on seasonal conditions. Access is strictly by boat, and divers must remain vigilant for boat traffic when surfacing. Water temperatures fluctuate significantly throughout the year, ranging from 13C in winter to 23C in summer.

El Tortu is a reef site located 1500 metres off the coast of Mataro, Spain. This site is suitable for beginners, featuring a consistent average depth of 10 metres. Access is exclusively by boat. Conditions vary, with visibility ranging from 5 to 25 metres and currents typically remaining mild. Water temperatures fluctuate significantly throughout the year, from 13C in February to 26C in August. Species recorded around this area include common octopus, Mediterranean moray, great barracuda, various wrasses, scorpionfish, and several nudibranch species such as the Mediterranean violet aeolid and Cratena slug. Divers should be aware of sharp coral present at the site.

El Negre Petit is a reef dive located off the coast of Mataro, Spain. The site features a reef structure that descends from 8 metres to a maximum depth of 25 metres, with an average depth of 18 metres. This site is suitable for beginners due to the mild currents and the ability to choose a depth that matches individual comfort levels. Visibility is typically around 9 metres. Boat access is required to reach the site, and local facilities provide air fills, boat charters, and guided tours. Divers should note that water temperatures fluctuate between 13 and 23 degrees Celsius throughout the year.

El Negre 15-22 in Mataro, Spain, offers a varied underwater landscape featuring a reef, wall, and drop-off. The site ranges from 4 metres to 27 metres in depth, with an average depth of 15 metres. Suitable for beginners, the site experiences mild currents and visibility between 5 and 30 metres. Access is by boat only, and guided tours are available through the local dive shop to help navigate the wall and crevices. Water temperatures fluctuate throughout the year, ranging from 13C in February to 23C in August and September. Divers should plan their thermal protection according to the seasonal temperature variations.

El Triangle is a reef site located 1000 metres offshore from Mataro, Spain. Accessible only by boat, the site features a rocky reef structure ranging from 8 to 20 metres in depth, with an average depth of 12 metres. Divers can expect mild currents and visibility typically between 10 and 25 metres. The site is suitable for beginner divers, though careful buoyancy control is required to avoid contact with sharp rocks and sea urchins found within the reef crevices. Water temperatures fluctuate seasonally from 13C in winter to 24C in late summer, necessitating appropriate thermal protection for the time of year.

El Pujol is a reef site located in Mataro, Spain, offering visibility between 20 and 30 metres. The topography extends from the shallows down to a maximum depth of 28 metres. Divers access this site exclusively by boat. Conditions are generally comfortable with mild currents, though the depth requires careful monitoring of bottom time to manage decompression risk. The site is suited for intermediate divers who can maintain buoyancy and depth control. Mediterranean fish, conger eels, moray eels, lobsters, and sunfish are recorded at this site.