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Giant Sponges can grow to impressing size. These specimen of filter animals live under a rock overhang at the north side of Rozengain Island, Banda Sea, Indonesia, 4°34'41.37 S 130°1'40.194 E at 20m depth

Tube Sponge, Bunaken National Marine Park, Bunaken, North Sulawesi, Indonesia, Asia

Image of the tube sponges in Little Cayman - Cayman Islands

natural sponge isolated on white background

Yellow Feather star ( Crinoid ) - Sea lily on Maldives

Yellow-tube sponge (Aplysina fistularis) on the coral reef of Guadeloupe (Caribbean, France)

Sea life Salp Glass sponge, and Orange Sea sponge from scuba diver point of view

Underwater environment beneath the ocean surface with seaweed and kelp beds.

Close-up sea sponge background with rough texture

An outdoor bin is full of sea sponges for sale at a retail shop in Tarpon Springs, Florida.

View of the Caribbean coral reef with the yellow tube sponge in Grand Cayman - Cayman Islands

$Barrel sponges (Xestospongia sp.) are a genus of marine sponges found in tropical and subtropical waters around the world. They are characterized by their large, barrel-shaped bodies, which can grow up to several meters in height. Barrel sponges are filter feeders, meaning they obtain nutrients by filtering plankton and other small organisms from the water. They are an important part of the marine ecosystem, as they help to improve water quality and provide a habitat for other marine life.\n\nBarrel sponges are found in a variety of habitats, including coral reefs, seagrass beds, and rocky shores. They are most common in shallow water, but some species can be found in depths of up to 100 meters. Barrel sponges are typically attached to the substrate, but some species can be free-living.\n\nThe color of barrel sponges can vary depending on the species, but they are most commonly brown, gray, or green. The surface of the sponge is often rough and bumpy, and it may be covered in small spicules, which are tiny, needle-like structures that help to support the sponge's body.\n\nBarrel sponges are an important part of the marine ecosystem. They help to improve water quality by filtering plankton and other small organisms from the water. They also provide a habitat for other marine life, such as fish, shrimp, and crabs. Barrel sponges are also a source of food for some marine animals, such as sea turtles and sea urchins.\n\nBarrel sponges are a relatively slow-growing species, and they can live for hundreds of years. However, they are vulnerable to a number of threats, including pollution, climate change, and overfishing. As a result, some species of barrel sponges are now considered to be endangered.$

Tube sponge, Sea life Salp and Yellow Sea sponge from scuba diver point of view Underwater photo

Caribbean coral reef off the coast of the island of Roatan, Honduras

$These sponges are NOT photoshopped, that's the real color! The whole area is full of Bubble Tip Anemones Entacmaea quadricolor. A lot of Acropora sp. hard corals. Some Tropical Striped Triplefin Helcogramma striatum (4 cm = 1.6 inches) are there. A dive in Indonesia without them is quite rare! Many Stinging Hydrozoan Aglaophenia cupressina, they are useful to indicate good buoyancy to divers, as bad one is painful! South West side of Pura Island, Pantar Strait, Alor, Indonesia, 8°19'8\$

Yellow tube sea sponge - Aplysina aerophoba, underwater image into the Mediterranean sea

Colorful and stunning Caribbean marine life with the Great Star Coral (Montastrea Cavernosa) in Cayman Brac - Cayman Islands

Sea sponges in underwater caves in Bulgaria, Fauna of the Black Sea

Underwater nature background of healthy coral garden reef ecosystem in natural sun light. Great Barrier Reef, Queensland, Australia.

Mushroom coral Sea life Macro, close up. Hard Coral reef Underwater photo Scuba Diver Point of View Red sea

Sponges, the members of the phylum Porifera for education in marine.

Geirangerfjord near Hellesylt in Norway. This is seaweed in the Fjord.

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