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Night dive. Sea spiders and evolutionary link of nudibranches

Recent night dive was really interesting. So we didnt want to wait long time the second night. Sunset at 20:00, at this time you have to be already in the water, well, or near it 🙂

Tuesday's weather is suitable for night diving. The sea is calm and there is no wind. I took Andrey at his house. We load the equipment into the car and move. The bridge ... the camera ... shot ... the next ... shot ... The engine growls, the car rides along the peninsula of Saperny. 15 minutes on the road and we are on the site — Cape of Melkovodny, home reef of the Sea Frogs club. We unload the equipment and prepare tto the dive. Malamute Maya rushes back and forth, apparently worried that we decided to plunge into the night. Ira decided to join us. The commander of Sea Frogs — Eugeney, «caring» helps the lady to be packed in a dry suit. The fees are a little delayed ... We enter the water at 21:00 ...

 

Visibility is not that we desired ... Two days ago there was a strong south wind, and then it caused this chaos in the water. Two powerful torches light a three meters in front of us, but we don't need more with a macro-lens on the camera. Hydroids jellyfish Sarsia Tubulosa fly by in the dark. I do a couple shots and go further. A glimpse of the glare of a Hypomesus looks out. Its scales, like a mirror, reflect the light of our lights. But not only the surf smelt can boast of reflective scales. Smaller fish — sand eel, with interest goes to the light of the camera. The females of this species are smaller and colored monotonously, the males can easily be identified by the red streak on the back. A juvenile is completely transparent, you can only notice the flare of it's the eyes. At the bottom there was another interesting fish — a Japanese river goby. This species is common for the Peter the Great Gulf, but chooses the mouths of rivers with more fresh water. On algae we notice grass shrimp, however this one was frightened of the light of our headlights and hurried to retire. Suddenly, huge annel worm eulalia viridis flies infront the mask of Andrew. I make a shot «scene from a horror film» 🙂

 

  • медуза S. tubulosa
  • Японский речной бычок
  • малоротая корюшка
  • самец песчанки
  • молодь песчанки

 

 

Hydroid jellyfish Bougainvillia noticeably grown. Now you do not need to strain your eyesight, to see them. Under the dome of these jellyfish appeared white clusters of offspring (polyps). This polyps caused the sea spiders Nymphon grossipes to rise from the bottom. The sight of spiders leaves much to be desired, but nature has foreseen everything. Sea spiders feed with hydroids, and there are special receptors that catch the «smell» of food on their body. I managed to photograph the attempt of a spider on a jellyfish. Catching her, he firmly held the dome of the jellyfish with his paws. Then he climbed up with jaws into the dome of a jellyfish and tore a bunch with offspring. Release the jellyfish, he hovers in water, spreading his paws. At this point, he sucks the hydroids from the jellyfish eggs, holding the food with the help of small egg-laying paws. The body of the spider consists mainly of thin legs, so its digestive system takes up most of it. The whole action took about 5 minutes.

 

  • Паук с добычей
  • Потенциальная жертва морского паука

 

While I was shooting a drama with a spider and a jellyfish, Andrew led Ira to the shore. Later we must meet near the pier wall. I take the azimuth and move to the meeting place. Jellyfish pass by me. Curious shrimp and flounder study me flying through the water. Among the thickets of algae I notice a beautiful fish — the Japanese warbonnet. This species is endemic to the Sea of Japan and the darling of all divers. Honestly, I was surprised to meet it in Novik Bay. At the wall of the pier, on the stone I meet a huge grass shrimp. It willingly poses for the camera. A little further I find a nice nudibranch diaulula o'donoghue. This species of Doridium feeds on sponges and is a common species in our waters. I notice the light of the lantern. Andrey joined.

 

  • Berthella califfornica

 

The dive time is 80 minutes! We move to the shore. Night adventures are over for today, it's time to go home to view gigabytes of pics.

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