Is krill shrimp

Yes and no.

Shrimp is a relatively general term used to describe many different species of crustacean which are similar in structure. The term is used much the way some people use the term "bee" to describe any variation of flying, stinging insect. While it may be socially acceptable to describe all of these insects as "bees," and most people would grasp a general idea of what is being conveyed, there are as we all know many other types of flying, stinging insects such as true bees: European honey bees, carpenter bees, North American honey bees, ect; as well as false bees: Paper wasps, common hornets, yellow jackets, ect.

Krill fall into the category of "false shrimp." While many people may to refer to them as shrimp and while they are indeed genetically and physically very similar to many species of shrimp, they are, in fact, not shrimp; they are krill.