Learn how to say Euphausiid correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word euphausiid:
a shrimp-like planktonic marine crustacean of an order which includes krill.
Order Euphausiaceae, subclass Malacostraca
late 19th century: from modern Latin Euphausia (genus name from Greek eu ‘well’ + phainein ‘to show’ + ousia ‘substance’) + -id2