Taucher@Net - Byron Bay´s Scuba Zoo. Eine unglaubliche Vielfalt ! Gefilmt von Tim Hochgrebe, Besitzer von PLANULA Divers Retreat in Byron Bay - http://www.planula.com.au - gefilmt von underwater

Digital Coral Guide. Free Download! http://coralidea.com Video of a freshly released favia larvae.

After modifing this 3 gallon tank to generate a circular flow (kreisel), I raised a culture of brine shrimp in it to see how well the design worked. I was very pleased with the result. later that week, while getting dry goods from the local fish shop, I saw a bowl shaped tank with Upside Down Jellyfish polyps and ephyras. These had come in to the shop as hitch hikers. These ephyra ended up killing the sea horses housed in the bowl. I asked the owner if she would part with a few. As I hoped to raise them through their life cycle. Adult jellies (medusae) reproduce sexually resulting in larva (or planula). After a period of drifting, the planula will settle on any and evey available surface becoming a stationary polyp that can clone itself. Each polyp, resembling aptasia anemonies, will begin to bud-off a small, free swimming medsua called a ephyra. Four little ephyras came home with me that night. Six more were to follow the next day. It's been three weeks now and all ten are with me and growing fast. The largest is now 7/8" across the bell.

Nisi mi sudjen to znam vecno ces biti moj san zivot me ranio, zivot me kaznio sve mi zabranio Ja ljubim drugog jer tebe ne mogu srce mi place volim te sve jace i dok mu ljubav priznajem u dusi tvoja ostajem, golube Nisi mi sudjen to znam tuzan je svaki moj dan jednom sam planula sreca me zanela pa me obmanula

These two red rockcods (Scorpaena cardinalis) were seriously battling it out at Julian Rocks, Byron Bay, Australia on 10 December 2006. I would call this territorial behaviour - any comments ?

Trailer for Marine Passions - an audiovisual underwater extravaganza in 5.1 Dolby digital surround sound. Go to http://www.underwater.com.au/product.php/id/MP001 to get your copy of the full amazing DVD

Jellyfish look pretty weird because they come in strange shapes and colors. They are shaped like a bell or an inverted bowl from 3 millimeters to 2 meters in diameter. The bells of Jellyfish contain small sense organs that respond to light and gravity. Their jelly like bodies may be nearly clear, or a color such as pale blue, orange, brown, white or pink. Although Jellyfish are often glassy or pale bluish in color, they can also be yellow, deep blue, bright purple, pale lilac, bright orange, deep red. Some Jellyfish, when they are disturbed at night, give off a cold bright light called luminescence. Jellyfish may be tiny or quite large. Many of the most common kinds are saucer size. One specie in the cold arctic sea is huge; it's body can be more than 7 feet wide, and it's tentacles can be up to 120 feet long. Did you ever wonder how Jellyfish reproduce with that squishy like body? Well now you're going to find out. Individual Jellyfish are either male or female. The eggs and sperm develop in special areas called Gonads inside the body wall. The gonads are frequently very colorful and add greatly to the beauty of the living Jellyfish. When all of the eggs and sperm are fully developed, they are released into the stomach and then through the mouth into the sea. Some of the eggs stick to the frilly mouth lips which surround the mouth of the Jellyfish. There they are fertilized by the sperm and continue to develop. As in all many-celled animals, the microscopic fertilized eggs begin a series of cell divisions which finally result in an embryo. However, the embryo does not develop directly into a baby jellyfish, but becomes a tiny, flattened creature called a Planula.

Jellyfish look pretty weird because they come in strange shapes and colors. They are shaped like a bell or an inverted bowl from 3 millimeters to 2 meters in diameter. The bells of Jellyfish contain small sense organs that respond to light and gravity. Their jelly like bodies may be nearly clear, or a color such as pale blue, orange, brown, white or pink. Although Jellyfish are often glassy or pale bluish in color, they can also be yellow, deep blue, bright purple, pale lilac, bright orange, deep red. Some Jellyfish, when they are disturbed at night, give off a cold bright light called luminescence. Jellyfish may be tiny or quite large. Many of the most common kinds are saucer size. One specie in the cold arctic sea is huge; it's body can be more than 7 feet wide, and it's tentacles can be up to 120 feet long. Did you ever wonder how Jellyfish reproduce with that squishy like body? Well now you're going to find out. Individual Jellyfish are either male or female. The eggs and sperm develop in special areas called Gonads inside the body wall. The gonads are frequently very colorful and add greatly to the beauty of the living Jellyfish. When all of the eggs and sperm are fully developed, they are released into the stomach and then through the mouth into the sea. Some of the eggs stick to the frilly mouth lips which surround the mouth of the Jellyfish. There they are fertilized by the sperm and continue to develop. As in all many-celled animals, the microscopic fertilized eggs begin a series of cell divisions which finally result in an embryo. However, the embryo does not develop directly into a baby jellyfish, but becomes a tiny, flattened creature called a Planula.

Ozlijeđenih nije bilo. Požar, koji je ugašen oko 18.30, gasilo je 14 vatrogasaca. Izgorjelo je 4 hektara trave. Očevid će pokazati zašto je gorjelo S balkona sam vidio gusti dim i vatru među obiteljskim kućama. Dok sam se spustio dolje, vatrogasci su već gasili požar. Vatra se u jednom trenutku približila kućama, kaže Josip Smilović, koji je u četvrtak oko 17 sati fotografirao požar u Splitu. Iz još nepoznatih razloga planula je trava u Jeretovoj ulici. Vatra je zahvatila nekoliko stabala i drveni stup. Ozlijeđenih nije bilo. Požar, koji je ugašen oko 18.30, gasilo je 14 vatrogasaca. Izgorjelo je četiri hektara trave.

. . . PICTURES OF THESE CORALS AT: http://www.shareapic.net/content.php?gid=426285 . . . . Corals were photgraphed during 3 week tour around Sulawesi. Corals are marine organisms from the class Anthozoa and exist as small sea anemonelike polyps, typically in colonies of many identical individuals. The group includes the important reef builders that are found in tropical oceans, which secrete calcium carbonate to form a hard skeleton. A coral "head", commonly perceived to be a single organism, is formed from thousands of individual but genetically identical polyps, each polyp only a few millimeters in diameter. Over thousands of generations, the polyps lay down a skeleton that is characteristic of their species. A head of coral grows by asexual reproduction of the individual polyps. Corals also breed sexually by spawning, with corals of the same species releasing gametes simultaneously over a period of one to several nights around a full moon. Although corals can catch plankton using stinging cells on their tentacles, these animals obtain most of their nutrients from symbiotic unicellular algae called zooxanthellae. While a coral head appears to be a single organism, it is actually a head of many individual, yet genetically identical, polyps. The polyps are multicellular organisms that feed on a variety of small organisms, from microscopic plankton to small fish. Polyps are usually a few millimeters in diameter, and are formed by a layer of outer epithelium and inner jellylike tissue known as the mesoglea. They are radially symmetrical with tentacles surrounding a central mouth, the only opening to the stomach or coelenteron, through which both food is ingested and waste expelled. The stomach closes at the base of the polyp, where the epithelium produces an exoskeleton called the basal plate or calicle. This is formed by a thickened calciferous ring with six supporting radial ridges. These structures grow vertically and project into the base of the polyp. When polyps are physically stressed, they contract into the calyx so that virtually no part is exposed above the skeletal platform. This protects the organism from predators and the elements. The polyp grows by extension of vertical calices which are occasionally septated to form a new, higher, basal plate. Over many generations this extension forms the large calciferous (Calcium containing) structures of corals and ultimately coral reefs. Formation of the calciferous exoskeleton involves deposition of the mineral aragonite by the polyps from calcium ions they acquire from seawater. The rate of deposition, while varying greatly between species and environmental conditions, can be as much as 10 g / m² of polyp / day (0.3 ounce / sq yd / day). This is light dependent, with night-time production 90% lower than that during the middle of the day. Corals predominantly reproduce sexually, with 25% of hermatypic corals (stony corals) forming single sex (gonochoristic) colonies, whilst the rest are hermaphroditic. About 75% of all hermatypic corals "broadcast spawn" by releasing gametes - eggs and sperm - into the water to spread colonies over large distances. The gametes fuse during fertilisation to form a microscopic larvum called a planula, typically pink and elliptical in shape; a moderately sized coral colony can form several thousands of these larvae per year to overcome the huge odds against formation of a new colony. The hermatypic, stony corals are often found in coral reefs, large calcium carbonate structures generally found in shallow, tropical water. Reefs are built up from coral skeletons and held together by layers of calcium carbonate produced by coralline algae. Reefs are extremely diverse marine ecosystems being host to over 4,000 species of fish, massive numbers of cnidarians, molluscs, crustaceans, and many other animals. Although corals first appeared in the Cambrian period, some 542 million years ago, fossils are extremely rare until the Ordovician period, 100 million years later, when Rugose and Tabulate corals became widespread. Corals are highly sensitive to environmental changes. Scientists have predicted that over 50% of the coral reefs in the world may be destroyed by the year 2030. Coral reefs also provide recreational scuba diving and snorkeling tourism.

Weird footage of my dendrophyllia simultaneously contracting and emitting "puffs" of white substance... waste or planulae?