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Hydra oligactis, also known as the brown hydra, is a species of hydra found widely dispersed in the northern temperate zone. It is a common organism found in still waters from early Spring to late Autumn. It is commonly found attached to the stems of water plants, the undersides of leaves, submerged twigs and on the surface of stones. When ...
Common names of fish can refer to a single species; to an entire group of species, such as a genus or family; or to multiple unrelated species or groups. Ambiguous common names are accompanied by their possible meanings. Scientific names for individual species and higher taxa are included in parentheses.
The fertilized eggs secrete a tough outer coating, and, as the adult dies (due to starvation or cold), these resting eggs fall to the bottom of the lake or pond to await better conditions, whereupon they hatch into nymph Hydra. Some Hydra species, like Hydra circumcincta and Hydra viridissima, are hermaphrodites [12] and may produce both testes ...
Hydra (genus) Hydra oligactis; Hydra viridissima; Hydra vulgaris; T. Transgenic hydra This page was last edited on 27 September 2021, at 19:27 (UTC). Text is ...
This is a list of fish families sorted alphabetically by scientific name. There are 525 families in the list.
This page was last edited on 27 January 2025, at 19:07 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Hydra oligactis. This species can reproduce in three ways: sexual reproduction, budding, and indirectly through regeneration. [11] When hydra reproduce sexually, simple testes, ovaries, or both will develop on the bodies of an individual. Sperm released into the environment by the testes enters the egg within the ovary.
Betta splendens, Siamese fighting fish (2018 [59]) Helostoma temminkii, Kissing gourami (2020 [60] [61]) Order Anguilliformes. Anguilla anguilla, European Eel (2012 [62]) Anguilla japonica, Japanese Eel (2022 [63]) Order Beloniformes. Oryzias latipes, medaka (2007 [64]) Order Callionymiformes. Callionymus lyra, common dragonet (2020 [65]) Order ...