cephalopod aggregation
Giant Australian Cuttlefish Aggregation
Giant Australian cuttlefish · Sepia apama
Annual breeding aggregation of giant cuttlefish in the shallow waters of upper Spencer Gulf, with elaborate male display and mating behavior.
When
Where
- Best current option
Whyalla / upper Spencer Gulf
Australia
May · Jun · Jul · Aug
The world's only known giant cuttlefish breeding aggregation; shore-accessible from Whyalla.
Not in our dive-site atlas yet.
Ethics
Do not handle cuttlefish; avoid contact with eggs on the reef underside.
Operators
We don’t have curated operator listings for this encounter yet. The “Where” section above is the right starting point — cross-reference local regulators’ permit lists before booking.
Required experience
Open Water; shore-entry, cold-water, and dry/thick-suit comfort. Many divers do this as snorkel.
Conservation
The Spencer Gulf aggregation crashed in the 2010s and has partially recovered; treat the site as ecologically fragile.
Limitations
Sources & methodology
How we summarise this
Aggregation numbers fluctuate; the Spencer Gulf population crashed in the 2010s and has only partially recovered.
Sources
- Global Biodiversity Information Facility — GBIF Secretariat
- Ocean Biodiversity Information System — IOC-UNESCO