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7. Tube Anemone (Ceriantharia sp.)



Subject:

The Tube Anemone, cnidarians belonging to the class of Ceriantharia, are fascinating creatures that can be found in many oceans around the world. Unlike other types of anemones, tube anemones live in a protective tube that they create themselves, which serves as a shelter from predators and harsh ocean conditions.


One of the most striking features of the tube anemone is its long, cylindrical body that extends from its tube. This body is made up of two distinct layers: an outer layer of tough, protective tissue, and an inner layer of soft, fleshy tissue that contains the animal's digestive and reproductive systems. The tube anemone's tentacles, which are used to capture prey, extend from the upper end of the body and are arranged in a circular pattern around the animal's tube-like mouth, also called the “pharynx”. These anemones can also live up to 40 years.


Underwater videography and photography has revealed the incredible diversity of colours and patterns exhibited by different species of tube anemones. Some tube anemones are brightly coloured, while others are more muted in colour.


One of the most interesting aspects of the tube anemone's behaviour is its ability to retract its body completely into its tube when threatened. This allows the animal to protect itself from predators and harsh ocean conditions, such as strong currents and rough waves. Underwater videography has captured this behaviour in stunning detail, showing how the tube anemone can quickly withdraw its tentacles and retract its body into its tube when it senses danger.


Another fascinating aspect of the tube anemone's behaviour is its ability to reproduce asexually by budding off new individuals from its body. Underwater videography has made it possible to capture this process in detail, showing how the tube anemone can produce new individuals that are genetically identical to itself. This ability to reproduce asexually allows the tube anemone to quickly colonise new areas and expand its population.


Underwater film making has also revealed the complex interactions that take place between different species of tube anemones and their surrounding environment. For example, some species of tube anemones have been observed to use their tentacles to anchor themselves to the ocean floor, allowing them to remain stable in strong currents and rough waves. Other species of tube anemones have been observed to attach themselves to rocks or other hard surfaces, using their tube as a protective shelter from predators and harsh ocean conditions.


One of the most remarkable things about the tube anemone is the incredible diversity of species that exist within this group. There are over 100 different species of tube anemones, each with their own unique adaptations to their specific environment. Images generated by underwater videographers have allowed researchers and marine biologists to study these creatures in greater detail, providing insights into the way that they interact with their environment and other marine animals.


Technique:

With a lot of tints of the same colour a boost in contrast and an increase of the saturation was necessary to accentuate the different details of the animal’s body. A vignette was added to draw the spectator’s eye to the animal’s pharynx.


Filming location:

This short underwater videoclip has been filmed in Bali, Indonesia 🇮🇩


More on this topic:

For another Tube Anemone insight please go to these vlog posts 35: https://www.beyondscuba.com/post/a-nocturnal-tube-anemone


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