The mortality of harbour porpoise from fishing is close to zero. Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.

Grey seal mortality as a by-catch of fishing does not jeopardize the viability of the population. Marine mammals are assessed by species in such a way that the worst-performing benchmark determines the status of the species.

The mortality of the Baltic ringed seal as by-catch of fishing does not endanger the vitality or the growth rate of the population towards a viable population. The by-catch mortality of the Archipelago Sea and the Gulf of Finland is close to zero. Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.

Grey seal has a population size of at least 10,000 individuals in the Baltic Sea, and in addition, the population growth rate is >7% or, when reaching environmental carrying capacity, the population size does not fall >10% on a 10-year average. Marine mammals are assessed by species so that the reference criterion giving the weakest status determines the status of the species.

The harbour porpoise population should grow in the main basin of the Baltic towards a viable population size. Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.

The population size of the Baltic ringed seal shall be at least 10 000 individuals in each of its three sub-units and, in addition, at the growth stage of the population, the rate of growth shall be > 7 % or the population size of the environment shall not fall > 10 % at a mean value of 10 years. Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.

About 90% of grey seals' 6-year-old females give birth to a live pup. Marine mammals are assessed by species so that the reference criterion giving the weakest status determines the status of the species.

> 5-year-old female ringed seal> 90% of pregnancies result in the birth of a chick. Marine mammals are assessed by species so that the reference criterion giving the weakest status determines the status of the species.

The distribution of the grey seal covers the entire Finnish marine area, which corresponds to its natural range before the decline of the stock. Marine mammals are assessed by species so that the reference criterion giving the weakest status determines the status of the species.

The distribution of the Baltic ringed seal covers the entire Finnish sea area, which corresponds to its natural range before the stock shrinks. Marine mammals are assessed by species in such a way that the worst-case benchmark determines the status of the species.

The porpoise distribution range extends to the Finnish sea areas, except the Bothnian Bay, and is observed every year in each sea basin (Gulf of Finland, Northern Baltic, Bothnian Sea, Mvarken, Archipelago Sea and the Sea Islands). Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.

The blubber thickness of grey seals is 40 mm for hunted individuals and 35 mm for by-catches. Marine mammals are assessed by species so that the reference criterion giving the weakest status determines the status of the species.

The blubber thickness of the Baltic ringed seal will vary according to dietary targets and have been the best in adults for 49 mm and for young people 40 mm. it is currently not possible to determine the threshold. Marine mammals are assessed by species in such a way that the criterion on the condition of the species is determined by the weakest condition.