Egg size distribution among fishes of the Seasonal Pack-ice Zone is bimodal. The fish is endemic to the polar regions (found nowhere else) and has developed in ways which make it dependent on the presence of ice.

Some bears follow the ice - and seals onto the ocean, while others scavenge for eggs and other land-based food. Its eggs are spawned under the ice, where they grow, even in sub-freezing temperatures. Ova diameter varies from 0.8 to 5.0 mm. Where polar bears are forced to spend the summer onshore due to lack of sea ice, pregnant polar bears may live off fat reserves for up to 9 months.
It exceeds 100 000 eggs only in a few nototheniid species and is commonly in the order of 1000 to 15–20 000 eggs. Gaff hook - A special-purpose, large and heavy hook to help hoist a slippery fish through a hole in the ice. Fecundity is commonly positively correlated with fish length and weight. This type of recycling helps to keep the population and natural reproduction of a fish species at a high level in a lake and allows a fish the chance to grow to be an adult. It is projected to be nearly gone by 2040. Summer sea ice is disappearing. Icefish, any of several different fishes, among them certain members of the family Channichthyidae, or Chaenichthyidae (order Perciformes), sometimes called crocodile icefish because of the shape of the snout.They are also called white-blooded fish, because they lack red blood cells and hemoglobin. The larvae then feed on the zooplankton − plentiful in mid-year, when the annual ice melt occurs. Publish in our journal partners Acta Ichthyologica et Piscatoria (0.708, 2017-2018 impact factor) and Journal of Fish Biology (2.038, 2019 impact factor) the results of your primary research on fish growth, weight-length relationships, reproduction (maturity, fecundity, spawning), food and diet composition, introductions and range extensions for faster subsequent entry in FishBase.