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  2. Hydra viridissima - Wikipedia

    en.wikipedia.org/wiki/Hydra_viridissima

    Hydra viridissima is a species of cnidarian which is commonly found in still or slow-moving freshwater [2] in the Northern temperate zone. Hydra viridissima is commonly called green hydra due to its coloration, which is due to the symbiotic green algae Chlorella vulgaris which live within its body. [ 3 ]

  3. Hydra (genus) - Wikipedia

    en.wikipedia.org/wiki/Hydra_(genus)

    Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are solitary, carnivorous jellyfishlike animals [2], native to the temperate and tropical regions.

  4. Hydra vulgaris - Wikipedia

    en.wikipedia.org/wiki/Hydra_vulgaris

    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.

  5. Hydrozoa - Wikipedia

    en.wikipedia.org/wiki/Hydrozoa

    Hydrozoa (hydrozoans; from Ancient Greek ὕδωρ (húdōr) 'water' and ζῷον (zôion) 'animal') is a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water.

  6. List of freshwater aquarium fish species - Wikipedia

    en.wikipedia.org/wiki/List_of_freshwater...

    Tank size Temperature range pH range Water Hardness Bristlenose pleco, bushynose pleco: Ancistrus spp. The bristlenose genus has at least 59 identified species and many others yet to be named. [16] Males and female both have long "bristles" on their nose, the males having distinctly longer ones. 72-84 F (20-27 C) Adonis pleco, polka dot lyre ...

  7. Hydra oligactis - Wikipedia

    en.wikipedia.org/wiki/Hydra_oligactis

    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 ...

  8. Ocean sunfish - Wikipedia

    en.wikipedia.org/wiki/Ocean_sunfish

    However, a young specimen at the Monterey Bay Aquarium increased in weight from 26 to 399 kg (57 to 880 lb) and reached a height of nearly 1.8 m (5 ft 11 in) in 15 months. [34] The sheer size and thick skin of an adult of the species deters many smaller predators, but younger fish are vulnerable to predation by bluefin tuna and mahi mahi.

  9. Marine invertebrates - Wikipedia

    en.wikipedia.org/wiki/Marine_invertebrates

    Marine arthropods range in size from the microscopic crustacean Stygotantulus to the Japanese spider crab. Arthropods' primary internal cavity is a hemocoel, which accommodates their internal organs, and through which their haemolymph - analogue of blood - circulates; they have open circulatory systems. Like their exteriors, the internal organs ...