This mesopelagic prawn, which primarily inhabits the open ocean and undergoes vertical migrations, bears a resemblance to shrimps but is not a true shrimp. It exhibits a “half-red” coloration, common among mesopelagic vertical migrators, where part of its body is transparent, while other regions, especially around the gut and internal organs, appear bright red. As with most sergestids, it features a short rostrum, measuring less than one-tenth the length of the carapace. The tiny rostrum is oriented obliquely, pointing upward and forward with an acute tip. One of its distinctive characteristics is the antennule’s flagellum, which is remarkably long, extending well beyond the entire body’s length. The antennules are held at an angle, extending forward and outward from the body for a distance exceeding one body length, and then the lengthy flagellae trail backward from a point of inflection. Males can reach up to 18.4 mm in carapace length and 6.1 mm in total length, while females can attain sizes of up to 17.8 mm in carapace length and 57 mm in total length.