In Animals. The Hebrew term tachash of Exodus 25:5 is considered by some translators to be a reference to blue processed skins. Other scholars dispute this and suggest instead that the term refers to either an ermine or an okape antelope or an okape or a giraffe or lastly a narwhal or dugong. The above term appears in a text which notes the various types of offerings that the congregation are to bring to the Tabernacle.
It is a kosher, large spiral tusked marine mammal.
Diet: Fish and molluscs.
Habitat: Arctic Ocean and southern Sinai shores.