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Representatives of the Lemnaceae, the duckweed family, are well-adapted for use as bioindicators for testing soil and water for toxic substances.  Their rapid multiplication and the simplicity of their anatomy are important advantages for this use.
A feeding Fungiid Coral by night, probably a Fungia granulosa (quite thick septa, alternating long and short). \nFungia, also known as mushroom coral due to the distinctive mushroom-like appearance, is a type of solitary hard corals, meaning they grow individually and do not form colonies like some other coral species.\nTriton Bay, Indonesia \n3°54'2.976 S 134°6'24.192 E at 6m depth
Background and texture seashell closeup
Giant clam - Tridacna maxima  Underwater Sea life  Coral reef  Underwater photo Scuba Diver Point of View Red sea
Tonicella lineata is a very colorful species of chiton from the North Pacific.
Woman holding a beetle larva in her fingers
A detailed close-up showcasing the intricate details of the Cyrtospirifer rudkinensis, a brachiopod fossil from the Devonian period. Sourced from Rudkino, Woronesch, Russia, this image is a testament to Earth's ancient biodiversity, perfect for educators, researchers, and marketers alike.
Anthopleura xanthogrammica, or the giant green anemone, is a species of intertidal sea anemone of the family Actiniidae. Other  names for this anemone include green surf anemone, giant green sea anemone, green anemone, giant tidepool anemone, anemone, and rough anemone.  Salt Point State Park, California.
\tSwan mussel (Anodonta cygnea) on the on ponds bottom. Close up
Sea Urchin Fossil.  The close-up image shows a  sea urchin fossil from the jurassic period on white background.
Leiden leaf c.s. under microscope
Big Blue Octopus Octopus cyanea  occurs in the tropical Indo-Pacific from eastern Africa to the Hawaiian Islands in a depth range from 0-150m, max. mantle length 22cm with arms to at least 80 cm. \nBig blue octopuses are found living in muddy, sandy, or rocky bottoms, and in seagrass beds. They create lairs or dens in crevices or coral rubbles within coral reefs. These dens aren't used for long term; on average individuals spend up to 35 days in one den. The average lifespan of big blue octopuses is 12 to 15 months.\nThis juvenile specimen was encountered in the Triton Bay, Indonesia \n3°54'41.052 S 134°7'18.204 E at 12m depth
Photomicrograph of mosquito larva, Culex species. Live speciman. 4X, wet mount, transmitted light.
amazing inhabitants of the microworld under a microscope
Top View of a Young Parasol Mushroom Against a Blurred Leaf Covered Forest Floor
Sea urchin shells of various colours
Microscope photo of a sambucus stem with parenchyma cells.
Monkey embryos in glass jar, Mexico City
close up on shells isolated on white background
chinese medicine acanthopanax root on wooden table
Chromodoris coi  nudibranch on corals of Bali
Photomicrograph of mayfly nymph, Baetis species, with leaflike gills on back. Live specimen. Wet mount, 2.5X objective, transmitted brightfield illumination.
Detail of small tunicates colonizing a coral reef in Komodo National Park, Indonesia. Tunicates filter organic material from the ocean, improving water quality.
Asthenosoma varium is a large urchin (25 cm) with flattened, flexible test (the plates are articulated rather than fused). Very mobile, short spines, arranged in rectangular areas, separated by spineless areas. Spines have a blue swelling close to the tip, filled with venom.Living in bay, lagoon, external reef; on sandy or rubble bottoms. The flexible test allows, changing the shape, to enter very narrow crevices. The swollen shape of the spines and the flexible test are unique features. \nAsthenosoma varium sting can be very painful, a strong local pain due to venom injection can last for hours.\nThis specimen was encountered in a very shallow tunnel in the Triton Bay, Indonesia \n3°54'51.39 S 134°7'24.81 E at 2m depth
Scallop isolated on white background
A collection of colorful shells collected on beaches in Ireland near Dublin at low tides
Orange-clubbed sea slug (Limacia clavigera) with its egg ribbon, white-bodied dorid with numerous orange-tipped projections on its body.
Shell series: sea shells in various colors
microscopic view on a cross section
Underwater photography of tropical reef  species in Papua New Guinea
Free Images: "bestof:Punctum pygmaeum shell 2.jpg Photo of a shell of Punctum pygmaeum Locality Germany Bayern W Allgäu between Trögern and Weiler Date November 1963 http //www"
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