Nassarius castus is a species of sea snail a marine gastropod mollusk in the family Nassariidae the Nassa mud snails or dog whelks. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Animal

Aquarius is the debut Studio album by the Progressive Metal band Haken. It is a concept album about a couple who has a mermaid daughter. The tracks are generally longer the shortest track being just under 7 minutes and the longest being nearly 17. The Album artwork was created by Dennis Sibeijn who has also worked with 3 Job for a Cowboy and See You Next Tuesday among others. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Album

Berberis beauverdiana is a species of plant in the Berberidaceae family. It is endemic to Peru. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Plant

Viktor Mikhailovich Chebrikov (Russian: Виктор Михайлович Чебриков) (27 April 1923 – 2 July 1999) was a Soviet Union public official and security administrator and head of the KGB from December 1982 to October 1988.Born in the industrial city of Dnipropetrovsk in eastern Ukraine on 27 April 1923 he finished military school in 1942 and served in World War II as a battalion commander. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Office Holder