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  • Coral Polyp Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4252.jpg
  • Coral Polyp Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4277.jpg
  • Coral Polyp Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4264.jpg
  • Coral Polyp Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4249.jpg
  • Soft coral (Order Alcyonacea). Corals are small colonial invertebrate animals. Individual polyps may join together to make large structures, which are the basis of coral reefs. Soft corals differ from hard corals in that there is no hard calcium skeleton laid down. Instead the polyps are connected by spongy tubes, which are strengthened by small calcium carbonate fragments called sclerites. Each soft coral polyp (at the ends of the branches) has eight tentacles with which it filters food from the water. Photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4081.jpg
  • Soft coral (Order Alcyonacea). Corals are small colonial invertebrate animals. Individual polyps may join together to make large structures, which are the basis of coral reefs. Soft corals differ from hard corals in that there is no hard calcium skeleton laid down. Instead the polyps are connected by spongy tubes, which are strengthened by small calcium carbonate fragments called sclerites. Each soft coral polyp (at the ends of the branches) has eight tentacles with which it filters food from the water. Photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4111.jpg
  • close up of coral polyps Photographed in the Red Sea Israel
    HN_110202_Eilat_7485.jpg
  • Israel, Eilat, Red Sea, - Underwater photograph of a Star coral (Favia sp.) with extended Polyps at night.
    HN_Underwater_1227.jpg
  • Israel, Eilat, Red Sea, - Underwater photograph of a Star coral (Favia sp.) with extended Polyps at night.
    HN_Underwater_1224.jpg
  • Israel, Eilat, Red Sea, - Underwater photograph of a Brain coral (Favia sp.) with extended Polyps at night.
    HN_Underwater_1250.jpg
  • Reef Stonefish (Synanceia verrucosa) camouflaged among coral. Its eye is seen at centre. This solitary fish inhabits reefs of the Indo- Pacific region, indistinguishable from the rocks amongst which it hides. The stonefish feeds on smaller fish and crustaceans, and grows up to 40 centimetres in length. The fins along its back (not seen) contain poisonous spines, used in defence. It is the world's most poisonous fish and can be fatal to humans unless a serum is applied immediately. Photographed in the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4898.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4995.jpg
  • Sea lily (order Crinoidea) closeup. The sea lily, or crinoid, has feathery arms which trap food particles from the water. The particles are then passed to the mouth along the arms. The sea lily is sessile, remaining in one place for its entire adult life, bonded to its substrate by a stalk. Photographed at the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4841.jpg
  • Scuba Divers pass by a coral reef Fan coral in the foreground photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4963.jpg
  • Underwater photography of a sunken ship wreck carrying a cargo of motorcycles. Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4532.jpg
  • Slate pencil sea urchin (Heterocentrotus sp.) on a reef. The sea urchin is a marine invertebrate of the phylum Echinodermata that includes starfish. Like a starfish, a sea urchin has five-fold radial symmetry. The arms have fused to form a spherical shell from which protective spines protrude. Here, the spines are thick to withstand the turbulent water of its shallow water habitat. This urchin is named for the fact that its spines were used to write on blackboards. A sea urchin uses tube feet on its underside to crawl over rocks. Its mouth is also on its underside, and its five jaws scrape up algae (microscopic plants) growing on the rock. Photographed at the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4835.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5102.jpg
  • dusky batfish (Platax pinnatus). This fish, also called the red-faced batfish, inhabits reefs in the tropical Indo-Pacific region, from the Red Sea to the Pacific islands. It feeds on algae, small fish and invertebrates, and can reach a length of around 50 centimetres.  Photographed at the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4143.jpg
  • Scuba divers ascend slowly from a dive. Decompression stations are marked on the rope for a controlled ascend photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4671.jpg
  • Underwater photography of a sunken ship wreck. Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4301.jpg
  • Reef Stonefish (Synanceia verrucosa) camouflaged among coral. Its eye is seen at centre. This solitary fish inhabits reefs of the Indo- Pacific region, indistinguishable from the rocks amongst which it hides. The stonefish feeds on smaller fish and crustaceans, and grows up to 40 centimetres in length. The fins along its back (not seen) contain poisonous spines, used in defence. It is the world's most poisonous fish and can be fatal to humans unless a serum is applied immediately. Photographed in the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4882.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5131.jpg
  • dusky batfish (Platax pinnatus). This fish, also called the red-faced batfish, inhabits reefs in the tropical Indo-Pacific region, from the Red Sea to the Pacific islands. It feeds on algae, small fish and invertebrates, and can reach a length of around 50 centimetres.  Photographed at the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4175.jpg
  • Reef Stonefish (Synanceia verrucosa) camouflaged among coral. Its eye is seen at centre. This solitary fish inhabits reefs of the Indo- Pacific region, indistinguishable from the rocks amongst which it hides. The stonefish feeds on smaller fish and crustaceans, and grows up to 40 centimetres in length. The fins along its back (not seen) contain poisonous spines, used in defence. It is the world's most poisonous fish and can be fatal to humans unless a serum is applied immediately. Photographed in the Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4911.jpg
  • Coral Reef Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5048.jpg
  • Coral Reef Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4113.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5160.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5116.jpg
  • Underwater photography of a sunken ship wreck carrying a cargo of motorcycles. Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4529.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4987.jpg
  • Scuba Divers pass by a coral reef fan coral in the foreground photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_5125.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4955.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4945.jpg
  • Underwater photography of a sunken ship wreck. Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4307.jpg
  • Coral Reef Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4108.jpg
  • Scuba Divers pass by a coral reef photographed at Ras Mohammed National Park, Red Sea, Sinai, Egypt,
    HN_Underwater_4992.jpg
  • 19th century illustration of Madrepora ("mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways as discovered by the marine zoologist Anne Thynne (1800-1866).[2] It is commonly known as horn coral. colony is branched with small polyps in cylindrical cups separated by perforated coenosteum. Terminal polyp bear six tentacles, while lateral polyps bear tweve tentacles. Madrepora is economically important because it takes part in the formation of coral reefs. Copperplate engraving From the Encyclopaedia Londinensis or, Universal dictionary of arts, sciences, and literature; Volume XIV;  Edited by Wilkes, John. Published in London in 1816
    IR_f_Londinensis_XIV_0097.jpg
  • 19th century illustration of Madrepora ("mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways as discovered by the marine zoologist Anne Thynne (1800-1866).[2] It is commonly known as horn coral. colony is branched with small polyps in cylindrical cups separated by perforated coenosteum. Terminal polyp bear six tentacles, while lateral polyps bear tweve tentacles. Madrepora is economically important because it takes part in the formation of coral reefs. Copperplate engraving From the Encyclopaedia Londinensis or, Universal dictionary of arts, sciences, and literature; Volume XIV;  Edited by Wilkes, John. Published in London in 1816
    IR_f_Londinensis_XIV_0093.jpg
  • 19th century illustration of Madrepora ("mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways as discovered by the marine zoologist Anne Thynne (1800-1866).[2] It is commonly known as horn coral. colony is branched with small polyps in cylindrical cups separated by perforated coenosteum. Terminal polyp bear six tentacles, while lateral polyps bear tweve tentacles. Madrepora is economically important because it takes part in the formation of coral reefs. Copperplate engraving From the Encyclopaedia Londinensis or, Universal dictionary of arts, sciences, and literature; Volume XIV;  Edited by Wilkes, John. Published in London in 1816
    IR_f_Londinensis_XIV_0092.jpg
  • 19th century illustration of Madrepora ("mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways as discovered by the marine zoologist Anne Thynne (1800-1866).[2] It is commonly known as horn coral. colony is branched with small polyps in cylindrical cups separated by perforated coenosteum. Terminal polyp bear six tentacles, while lateral polyps bear tweve tentacles. Madrepora is economically important because it takes part in the formation of coral reefs. Copperplate engraving From the Encyclopaedia Londinensis or, Universal dictionary of arts, sciences, and literature; Volume XIV;  Edited by Wilkes, John. Published in London in 1816
    IR_f_Londinensis_XIV_0102.jpg
  • 19th century illustration of Madrepora ("mother of pores") is a genus of stony corals, often found forming reefs or islands in tropical locations. The names Madrepore and Madreporaria were formerly applied universally to any stony coral of the family Scleractinia. They reproduce in three separate ways as discovered by the marine zoologist Anne Thynne (1800-1866).[2] It is commonly known as horn coral. colony is branched with small polyps in cylindrical cups separated by perforated coenosteum. Terminal polyp bear six tentacles, while lateral polyps bear tweve tentacles. Madrepora is economically important because it takes part in the formation of coral reefs. Copperplate engraving From the Encyclopaedia Londinensis or, Universal dictionary of arts, sciences, and literature; Volume XIV;  Edited by Wilkes, John. Published in London in 1816
    IR_f_Londinensis_XIV_0099.jpg
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