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1. Hydrozoa: Leptolina (Hydroidolina) Trachylina Hydrozoa is a diverse and wide-ranging taxonomic class (sometimes superclass) of marine and freshwater invertebrates within the phylum Cnidaria, whose members are characterized by a life cycle that always includes the presence of planula larva, and ... [100%] 2023-02-04
2. Hydrozoa: Hydrozoa, one of the most widely spread and prolific groups of aquatic animals. They are for the most part marine in habitat, but a familiar fresh-water form is the common Hydra of ponds and ditches, which gives origin to ... [100%] 2022-09-02
3. Hydrozoa: Hydrozoa (hydrozoans; from grc 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. The colonies of the colonial species can be large, and ... (Biology) [100%] 2025-04-26 [Hydrozoa]