Aglantha digitale is a hydrozoan medusa (family Rhopalonematidae) widely distributed in cold, open oceanic waters of the North Atlantic and North Pacific. It is notable for its ability to swim in two distinct modes: a slow mode using gentle bell contractions and a rapid escape response triggered by predator detection, achieved through giant axons in the bell musculature. This escape swimming behavior has made A. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.