when algae lives on a sloth it is considered demersal fish.
when algae lives on a sloth it is considered?
demersal fish
the pygmy three-toed sloth, like others in its genus, is an arboreal (tree-living) animal. this sloth can spend as many as 15 to 20 hours per day on trees. it moves at an extremely slow speed of , making it one of the slowest animals. the pygmy three-toed sloth is symbiotically related to green algae; a 2010 study investigated this in detail. different sloths harbour different types of algae – only "tricophilus" species were found on the brown-throated and pygmy three-toed sloths. these algae discolor the fur of the sloth, giving it a greenish hue – this serves as an efficient camouflage. some of these algae might be transferred to offspring through the mother, others may be picked up from the surroundings over time. the smaller size of pygmy sloths reduces their energy requirements for survival and reproduction, making them an apparent example of insular dwarfism. a bbc documentary, in which english naturalist chris packham recognizes the pygmy three-toed sloth as the first in his list of the top ten discoveries in the 2000s, shows a rare clip of a swimming pygmy three-toed sloth.
pygmy three-toed sloth
"h. viridissima" is currently the only known "hydra" species that has a permanent symbiotic relationship with photosynthetic unicellular chlorella algae. these algae are located in the endodermal epithelial cells which are enclosed by an individual vacuolar membrane, which enclose inorganic and organic molecules for storage. there are many cells that make up the endodermal epithelical on each cell there is usually 20-40 individual algea organisms. the algae supplies nutrients through photosynthesis to the "hydra". because the algae lives in the vacuoles of the cells, they are protected from the digestive enzymes of the "hydra". during long period of darkness, such as storms or blooms that block sunlight, algae loss starts from the tentacles, hypostome and growth region. but when light conditions return the algae undergo a rapid multiplication and can repopulate the host in approximately two days. chlorella undergo asexual reproduction which is in correlation with the division of the host. the "hydra" regulates the population of the chlorella algae by digesting excess algae or controlling algal cell division.
hydra viridissima