This Marine IBA is identified using seaward extensions around breeding colonies. It originates from the Russia (Asian) Exclusive Economic Zone (EEZ) and falls within the Pacific, Northwest FAO ocean region. The site covers an area of 8310 km2 and is 132 km away from the closet coastline. The depth ranges from 3 to 440 m, with a mean annual wind speed of 1.86 m/s, mean annual sea surface temperature falls between 4.74 and 7.72 °C and mean annual chlorophyll-a concentrations found to range between 1.2 and 2.48 mg/m3.
8 species trigger IBA criteria at this Marine IBA. Seaward extensions around breeding colony; Iony island include key near-colony areas for breeding populations of Crested Auklet (LC) , Parakeet Auklet (LC) , Least Auklet (LC) , Whiskered Auklet (LC) , Horned Puffin (LC) , Black-legged Kittiwake (LC) , Common Murre (LC) and Thick-billed Murre (LC).
BirdLife International (2020) Important Bird Areas factsheet: Iony island - Marine. Downloaded from http://www.birdlife.org on 05/08/2020.