merivesissä

Merivesissä is the inessive plural form of the Finnish noun merivesi, meaning seawater. The phrase translates roughly to “in seawaters” and is used to indicate location within sea water or environments composed of seawater. It appears in scientific, educational, and descriptive texts about marine environments.

Etymology and grammar: Merivesi is a compound of meri (sea) and vesi (water). In Finnish grammar, the inessive case marks location, and the plural ending -issä yields merivesissä, meaning “in seawaters” or more generally “in seawater environments.” The corresponding singular form is merivedessä. Other cases include merivesistä (from seawaters) and merivesiin (into seawater).

Usage: The expression is common in marine biology, oceanography, and environmental monitoring, where researchers describe samples, habitats, or processes occurring in seawater. Examples: “Näytteet otettiin merivesissä” (Samples were taken in seawater) and “merivesissä elävät planktonlajit” (plankton species living in seawater). The form helps specify marine water contexts as distinct from freshwater or terrestrial settings.

See also: Merivesi; seawater; salinity; marine biology.