Goldfish
The goldfish ("Carassius auratus") is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish.
Common thresher
The first scientific description of the common thresher, as "Squalus vulpinus", was written by French naturalist Pierre Joseph Bonnaterre in the 1788 "Tableau encyclopédique et méthodique des trois règnes de la nature". In 1810, Constantine Samuel Rafinesque described "Alopias macrourus" from a thresher shark caught off Sicily. Later authors recognized the genus "Alopias" as valid, while synonymizing "A. macrourus" with "S. vulpinus", thus the common thresher's scientific name became "Alopias vulpinus".