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Brown Mesh Sea Star – Stella marina Nardoa – Nardoa galatheae – www.intotheblue.it – www.intotheblue.link-2024-01-06-09h22m08s362
15
02:50

Brown Mesh Sea Star

Brown Mesh Sea Star, Nardoa galatheae, is a genus of sea stars in the family Ophidiasteridae. The Ophidiasteridae are a family of sea stars with about 30 genera. Occurring both in the Indo-Pacific and Atlantic Oceans; ophidiasterids are greatest in diversity in the Indo-Pacific.
Stefano
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0
Biodiversity – Biodiversità – www.intotheblue.it-2025-01-11-15h39m18s489
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13:24

Biodiversity

We are on an isolated patch of rock and coralligenous about 7.5 miles from the coast; the seabed varies from 49 to 52 meters, the area to explore has a surface area of ​​about a couple of basketball courts (about 600 square meters X 2). All around a sea of ​​mud and a mixture of mud/sand separates us from the main submerged reef 400/500 meters away, always on the bathymetric of 50 meters. ...
Andrea Cirivasi
44
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Luce del sole intotheblue.it-2024-08-11-11h48m32s861
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14:24

Colours of the Mediterranean Sea

Deep sea has an intense blue color. The light that penetrates the water changes its light intensity and its spectral composition by effect of  selective absorption by water of the different wavelengths that make up the visible spectrum. The ultraviolet and infrared stop the first few centimeters of depth, then extinguished the red, orange, yellow, green and purple and blue that reaches greater depths. ...
Andrea Cirivasi
125
0
Variable spiny starfish Coscinasteris s082
19
03:12

Variable spiny starfish

The Variable spiny starfish (Coscinasterias tenuispina) is called this because instead of the classic five arms it usually has seven. It is therefore an exception regarding the classic five-ray symmetry of echinoderms. Furthermore, as can be seen in this specimen, three of the seven arms are very small and are therefore slowly growing back. ...
netartstudio
258
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Red starfish Echinaster sepositus-16h58m11s527
12
02:25

Red starfish

Finding a starfish is one of the first experiences a diver can have, especially the Red starfish - Echinaster sepositus - one of the many species among the most common in the Mediterranean Sea. It is one of the first encounters, but even the most experienced divers always find this species of echinoderm fascinating. However, when they meet, some precautions must be taken to avoid causing damage to these splendid starfish. Surely picking them up with some care, handling them and forcibly removing them from the substrate on which they are located can lead to damage ...
netartstudio
223
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Spiny starfish Stella marina spinosa-2023-07-17-17h28m41s252
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06:50

Spiny starfish Martasteria

Martasteria or Thorny starfish (Marthasterias glacialis Linnaeus, 1758) is one of the most common starfish in the Mediterranean Sea, it is an echinoderm of the Asteriidae family. In this video we see it lying on a cliff that varies from 41 to 49 meters deep, rich in red Gorgonians of the Paramuricea clavata species and the classic yellow sponges of the Verongia species, therefore a guaranteed show of colors at the expense, however, of the visibility of the water about two or three meters. ...
netartstudio
194
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vlcsnap-2022-03-16-11h16m43s348
15
04:37

Spiny Starfish - Tank Star

The Martasteria or Spiny Starfish, Marthasterias glacialis, is an echinoderm of the Asteriidae family common in the Mediterranean Sea. Also called a Tank star, due to the characteristic plates bristling with thorns that distinguish it from other starfish, it has a regular shape with five arms. The body is characterized by spines of variable color: white, gray, brown, red, blue. It appears to be the largest species in the Mediterranean, capable of reaching even 85 centimeters in diameter.
Fanino Cirivasi
149
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vlcsnap-2021-11-03-12h10m05s880
27
04:39

Purple Starfish

The Purple Starfish, is a species of starfish from the East Atlantic (from mainland Portugal and the Azores down to the Gulf of Guinea) and the Mediterranean Sea. It has a big variation in colour (from red to orange) and may present brown spots. The central disc is small, covered by irregular plates, and the arms are thinner near the central disc. Each arm has lines of respiratory papillae. It can reach 40 cm in diameter.
Stefano
257
0
vlcsnap-2021-01-15-11h56m24s577
21
03:11

Basket Star

The Basket Star is characterized by five tentacles, each branched several times, with which it clings to the branches of the soft corals and which are opened at night to feed on. The body has a diameter that can reach 8 centimeters, with the complete opening of the tentacles the maximum width of the entire animal can reach 80 centimeters. It feeds passively with the open tentacles, in particular of planktonic microparticles.
Fanino Cirivasi
237
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vlcsnap-2021-11-05-20h51m36s915_T
10
11:11

Sea urchin reproduction

Also this summer we met some sea urchins all piled in one place. We therefore think we have filmed again the reproduction of  Sphaerechinus granularis. Like other echinoderms, sea urchins reproduce in the summer ...
Andrea Cirivasi
329
0
vlcsnap-2019-11-08-11h17m21s225
12
01:19

Purple sea Urchin

Sphaerechinus granularis is a species of sea urchin in the family Toxopneustidae, commonly known as the purple sea urchin. Its range includes the Mediterranea Sea and eastern Atlantic Ocean. ...
Fanino Cirivasi
195
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Medusa mediterranea Rhizostoma pulmo – Polmone di mare – Big mediterranean barrel jellyfish – www.intotheblue.it-2024-01-31-15h09m09s191
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Simmetria e organismi marini

Simmetria in biologia è la distribuzione equilibrata di parti del corpo duplicati o forme all'interno del corpo di un organismo. In natura e biologia, la simmetria è sempre approssimata. La simmetria crea una classe di modelli in natura ...
Andrea Cirivasi
470
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vlcsnap-2020-05-13-18h07m38s589
20
02:07

The blue spiny starfish

Coscinasterias tenuispina is a starfish in the family Asteriidae. It is sometimes called the blue spiny starfish or the white starfish. It occurs in shallow waters in the Atlantic Ocean and the Mediterranean Sea. Coscinasterias tenuispina has from 6 to 12 arms (usually 7), often of varying lengths, ...
Fanino Cirivasi
633
0
La Stella Gorgone – The Basket Star – Astrospartus mediterraneus – intotheblue.it – vlcsnap-2019-11-27-10h10m19s383
8
01:53

Basket Star

The Basket Star (Astrospartus mediterraneus), (Risso,1826) is a echinoderm belongs to the phylum Echinodermata, to the Ophiuroidea class, Gorgonocephalidae family. ...
Fanino Cirivasi
769
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