Crustacean larva stop after a single copepodid stage. Once the gonads develop, there are no further moults. Chalimus (plural chalimi) is a stage of development of a copepod parasite of fish, such as the salmon louse ("Lepeophtheirus salmonis"). "Chalimus" Burmeister, 1834 is also a synonym for "Lepeophtheirus" Nordmann, 1832. The single genus in the Facetotecta, "Hansenocaris", is only known from its larvae. They were first described by Christian Andreas Victor Hensen in 1887, and named "y-nauplia" by Hans Jacob Hansen, assuming them to be the larvae of barnacles. The adults are presumed to be parasites of other animals. Crustacean larva Crustaceans may
Snow goose Snow goose The snow goose ("Anser caerulescens"), consisting of both a white phase and blue phase (blue goose), is a North American species of goose commonly collectively referred to as "light geese". Its name derives from the typically white plumage. Many taxonomic authorities placed this species and the other "white geese" in the genus "Chen". Most authorities now follow the traditional treatment of placing these species in the "gray goose" genus "Anser". The scientific name is from the Latin "anser", "goose", and " caerulescens", "bluish", derived from "caeruleus ", "dark blue". This goose breeds north of the timberline in Greenland,