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Swellshark
Common

Swellshark

Cephaloscyllium ventriosum

A small catshark species known for its ability to inflate its body by gulping water or air when threatened. They have a mottled brown and yellow coloration with dark spots and blotches.

The record

Swellshark at a glance

Scientific name
Cephaloscyllium ventriosum
Typical size
30-40 inches, 5-10 lbs
Water
Saltwater
Habitat
Sharks and rays
Rarity in the Fishdex™
Common
Where it lives

Habitat

Found along the Pacific coast from central California to southern Baja California in rocky reefs and kelp forests from shallow waters to depths of 1,500 feet. They are nocturnal and rarely targeted by anglers, though occasionally caught incidentally by bottom fishermen. They prefer hiding in crevices and caves during the day.

Catch one and it is yours

Log a swellshark through the Cobia Camera and this entry fills in with your photo, your personal best, and the exact conditions on the day. The app also carries the slot and season rules for wherever you are standing.

How the Fishdex™ works
Questions

Swellshark questions people ask

Swellshark is Cephaloscyllium ventriosum.

A typical swellshark runs 30-40 inches, 5-10 lbs. Cobia records the length and weight of every swellshark you log and keeps your personal best on its Fishdex entry.

Found along the Pacific coast from central California to southern Baja California in rocky reefs and kelp forests from shallow waters to depths of 1,500 feet. They are nocturnal and rarely targeted by anglers, though occasionally caught incidentally by bottom fishermen. They prefer hiding in crevices and caves during the day. It is a salt water species, filed under sharks and rays in the Fishdex.

Yes. Log one through the Cobia Camera and this entry fills in with your own photo, your personal best, and the conditions on the day you caught it. The app also carries the slot limits and season dates for wherever you are standing. It is free.

Free on iPhone

Tomorrow morning starts tonight

Set your home water, pick a drive radius, and wake up to a plan.

Download Cobia on the App Store Android coming soon

iPhone, iOS 17 or later. Setup takes about a minute.