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Swell Shark Egg Case

Cephaloscyllium laticeps


The egg case of an Australian Swell Shark is a laterally flattened flask-shaped capsule (13 cm x 5 cm) with transverse ridges. At each corner were tendrils that looked like coiled fishing line. The capsule and tendrils looked like a large fish lure & line as it lay amongst rocks.
a One looked quite clean whilst the other had barnacles growing on it.


Spotted in the inter-tidal area amongst rocks. ( Cape Conran)


The swell shark eggs are laid in capsules, two at a time. each capsule has a single egg and arising from the four corners of the capsule are tendrils by which the capsule is attached to sea weeds or other bottom structures. The length of the tendril depends on the wave action in the area.
The embryo develops with the capsule, living off the yolk in the yolk sac. a live young hatches after twelve months.
The shark eggs are predated upon by marine snails.
Class: Chondrichthyes
Order: Carcharhiniformes
Family: Scyliorhinidae

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Leuba Ridgway
Leuba Ridgway a year ago

Thanks Neil. It was supposed to be a quick stroll along this beach as it was getting dark and we were on a road-trip. But the rock pools and shore had so many splendid creatures that we ended up staying for quite a while. Would like to visit there again sometime - faces Bass Strait.

Neil Ross
Neil Ross a year ago

Another seaside gem. I've yet to see anything like this. Great series and notes, Leuba, and thanks for sharing.

maplemoth662 a year ago

A pretty, egg case....

maplemoth662 a year ago

Three, very interesting photos....

Leuba Ridgway
Spotted by
Leuba Ridgway

Victoria, Australia

Lat: -37.79, Long: 148.72

Spotted on Mar 22, 2018
Submitted on Mar 30, 2018

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