Home › Words › S › swellsharkswellsharkswellshark means cephaloscyllium ventriosum, a catshark of the family Scyliorhinidae.Among words judged in Lexicurio's Arena, swellshark ranks #16,730 of 42,749 for Qualifying.EtymologyFrom swell + shark.nounCephaloscyllium ventriosum, a catshark of the family Scyliorhinidae.Definitions & examples from Wiktionary (CC BY-SA 3.0).