Greater spiny crab
Swimming, Snorkeling and Diving to See and Observe the Greater spiny crab
The spider crab dwells on rocky or sandy seabeds, or in seaweed to a depth of 50m. The juveniles hide from their predators at a depth of 20 m. Its shell changes color from brown to red, which enables him to blend in its environment by covering itself in seaweed, sponges, and small anemones. It molts several times for one year until it reaches its adult size. It can weigh up to 3 kilos and reaches a size of 25 cm. It can live for 7 years.
In certain periods, the adults start migrating towards the open sea. The next season, the spider crabs return following the same path to the coastline.
CHECK SEASONALITY
Maja brachydactyla
Macro
Araignée de mer Atlantique, Greater spiny crab, Spiny spider crab
Food
The adults diversify their diet with seaweed, sea urchins, starfish, brittle fish, crustaceans, and fish. Their predators are octopuses, lobsters, conger eels.
Breeding
The female is fertiles when it starts molting. Depending on its size, it can lay up to five thousand eggs.
Dive centers
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Season Challenge Azores Islands
Azores
- Ponta Delgada

Season Challenge Azores Islands Diving Center is located on the marina Pêro de Teive, in Ponta Delgada. Vans with 6 seats are used to transport equipment and clients to their hotels, free of charge. Open all year round from 8 am to 8 pm, the centre has to change rooms with toilets and hot showers. Free tea, coffee, and water are available. See you at the booking office for land and sea activities. A PureAir certified inflation station by Bauer allows the inflation of nitrox and trimix blocks. The rental equipment is from Cressi.
Embark for two dives per day, aboard two RIBs of 6 and 14 divers, each equipped with GPS, sonar, VHF, and radar. The 10-meter Challenge, with a capacity of 14 divers, is well prepared for long trips and offshore dives. The Season, 6.25 meters long, with a capacity of 6 divers, is used for small groups and coastal dives. The equipment is carried by the center. If the number of participants is sufficient, day trips are offered with lunch on board. These offshore dives, far from the coast, allow you to observe manta rays in the open sea.
Accompanying persons are welcome on board if there is room. PADI courses are offered from beginner to Divemaster level as well as technical diving courses. Take the opportunity to visit Ponta Delgada and its cultural sites, hikes for all levels of difficulty with a guide, and the tour of the island by van to the village and lake of Furnas with Season Challenge Azores Islands Diving Center. [+]
- fast boat
- Free hotels transfer
- PADI Training
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Espirito Azul
Azores
- Vila Franca do Campo
   
The Espirito Azul diving center is located in the marina of Vila Franca do Campo, on the island of Sao Miguel, Azores. Open every day of the year, you make an appointment at Espirito Azul in the morning at 9 am and in the afternoon at 2 pm. For day trips, departure is at 7:00 am with a picnic provided. At Espirito Azul, you will find changing rooms with hot and cold showers, toilets, a store, a workshop to have your equipment serviced, a nitrox, trimix, and oxygen filling station, a room, and a pool of 3, 7, 10, 12 and 15-liter diving cylinders (DIN and INT) with one or two outings. The equipment is provided by Espirito Azul.
Fifteen complete sets of equipment are available for rent. There is space to rinse and store your personal equipment. Don't hesitate to bring your rebreather too! When you take your nitrox training at Espirito Azul, you get free nitrox during all your stays in the Espirito Azul dive school! PADI courses for beginners are offered from Discover Scuba Diver to Advanced Open Water Diver. At Espirito Azul, expect two exploration dives per day on one of the 3 RIB boats, starting from the marina of Vila Franca do Campo.
Dives include skipper, guide, boat, and gas up to 6 nautical miles from the center, insurance, tank and weights. Visit the best spots in the Azores, in Formigas, and Dollabarat. Ideal for diving with stingrays and eagle rays? Go to Dori and Banco D.Jao De Castro! Snorkeling trips along the coast are also possible. Ask for the photos taken as a souvenir during your dives! The organization of barbecues on the beach and aperitifs in the marina contribute to the nice atmosphere of Espirito Azul. [+]
- Diving around Islands
- fast boat
- Between 30 and 40 dive sites
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PlanetOcean
France
- Hendaye
 
The PlanetOcean diving center is located in Port Florida, within the Decathlon shop in Hendaye. Open all week long from 8 am to 6 pm, the premises are arranged in such a way as to welcome you comfortably with separate men's and women's changing rooms, hot showers inside and outside PlanetOcean, individual lockers, rinsing bins, a room to store rental equipment as well as your own!
And to complete the focus on training, there is a classroom with Wi-Fi, a swimming pool that serves as a diving pit, and a restaurant for a break after diving. The PlanetOcean training center offers PADI and FFESSM courses for beginners ranging from Discover Scuba Diver to certifications for professionals with the Divemaster and Open Water Instructor. Freediving courses are also offered here, combining relaxation, breathing control, and underwater exploration.
All freediving disciplines are taught here, whether static or dynamic, free immersion or constant weight, in the pool or at sea. Come aboard the Betiko, an 11-meter long aluminum boat with a capacity of 29 divers, covered against rain and sun. The semi-rigid Bidaia will also take you quickly to the best diving spots in Hendaye, such as the Anchors, the lobster bank, and the Bay of Pigs, ideal for your first scuba diving experience. In season, you can observe sunfish, the mola-mola, in Hendaye. [+]
- Welcome groups
- Mola Mola Watching
- Apnea Center
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Best Spot Azores Dive Center
Azores
- Ponta Delgada
  
Best Spot Azores Dive Centre is located in Ponta Delgada, on the island of Sao Miguel, Azores. Here you are in a 5 star PADI and AWARE dive center. Nevertheless, PADI training for beginners is in the spotlight with Discover Scuba Diver and Scuba Diver sea baptisms. Choose the 10-dive package with or without equipment rental, if you want to have time to observe pelagic animals. On Best Spot Azores Diving center boats, you have access to around 50 dive sites around Faial Island.
Some of the Best Spot Azores dive guides are biologists who give you an educational introduction to the marine life of the Azores. Experienced, they guide you in a calm, relaxed and safe manner. During your diving holiday in the Azores, go on long trips out to sea to observe the passage of rays, tuna, and kingfish in the blue. Take advantage of a diving holiday on Sao Miguel Island to go on snorkeling trips with family and friends, with insurance and equipment included.
Best Spot Azores guides explain how to use the equipment, fins, mask, and snorkel and give you technical tips to practice safely. The Best Spot Azores diving club organizes trips to the sea, either for a walk along the coast or for a beautiful encounter with the local fauna, in the middle of the Azores' underwater landscapes, in a zen atmosphere. [+]
- Welcome groups
- No equipment carrying
- Eco responsable
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Aber Wrac'h Plongée
France
- Landeda

Aber Wrac'h Plongée is located in Landeda, Finistère, in the west of France. Aber Wrac'h Plongée is open all year round. The infrastructure of Aber Wrac'h Plongée is adapted to the comfort of the divers, in the heart of the deep water harbor, a few steps away from the shops. Aber Wrac'h Plongée offers you the whole range of FFESSM training courses from the baptism to the level 3 initiation as well as explorations.
The dives at Landeda are done along the Côte des Légendes, near Aber Benoit up to the Ile Vierge. Expect also nice dives with an abundant fixed fauna on the Roche aux Moines, Basse Marie, La Grande Fourche.
When the weather allows it, take advantage of wreck trips such as the Elektra, a Greek cargo ship, sunk in 1963 on 20 m of water, or the Amoco Cadiz, a supertanker that ran aground about thirty years ago in the north of the Abers, in Portsall.
The dives in Aber Wrac'h take place at a depth of 10 meters in the middle of a great wealth of flora and fauna such as sole, tilefish, edible crab, curlew, and sepiola. Don't miss the memorable observation of the grey seals. They live in a colony at the exit of the Aber, next to the lighthouse of the virgin island! Aber Wrac'h Plongée organizes very interesting organic courses.
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- fast boat
- Friendly atmosphere
- Diverse diving
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Where to see, swim, and dive with Greater spiny crab ?
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