Guided Dives With Giant Spider Crabs

Guided Scuba Dives With Giant Spider Crabs
Guided Scuba Dives With Giant Spider Crabs, © Sam Glenn-Smith

Due to the Coronavirus COVID-19 pandemic we will be providing Guided Dives with a maximum of two customers per dive guide.
Last updated: 14-Nov-2020

Every year from late-May to mid-June one of the world's most awesome aggregations of marine life happens in the southern waters of Port Phillip. Giant Spider Crabs come together to moult in the shallow waters, often showing up at local piers. For those wishing to see this stunning event up close and peronal, this Scuba Doctor Guided Dive is for you.

A feeding Smooth Stingray looking for a meal of Giant Spider Crab
A feeding Smooth Stingray looking for a meal of Giant Spider Crab, © Sam Glenn-Smith

Tours begin with your friendly and highly experienced guide preparing you for the guided dive with information on the marine life you can expect to encounter, plus getting you kitted up with any hire gear (BCD, regulator, wetsuit, cylinder and/or weightbelt) you may need.

Giant Spider Crabs aggregating on a pier pylon
Giant Spider Crabs aggregating on a pier pylon, © Sam Glenn-Smith

Then you'll travel to nearby Blairgowrie Pier or Rye Pier where the Giant Spider Crabs carpet the seabed as they gather to moult. You might see them moulting, or watch predators like rays, birds, seals and dolphins come to feed on them while they're still soft after moulting.

An amazing aggregation of Giant Spider Crabs in full swing
An amazing aggregation of Giant Spider Crabs in full swing, © Sam Glenn-Smith

The Scuba Doctor hosted the BBC Natural History Film Unit in June 2016 and 2017 while they shot footage of the Giant Spider Crab aggregation for the documentary Blue Planet II.

Get up close and personal with thousands of Giant Spider Crabs
Get up close and personal with thousands of Giant Spider Crabs, © Sam Glenn-Smith

The Scuba Doctor offers Morning 9 am, Afternoon 1 pm and Night 6 pm Guided Dives to see the Giant Spider Crabs!


Book your PADI Discover Local Diving Experience now! It includes a PADI Professional supervised dive in an area (normally a local pier) on the Mornington Peninsula.

For more information, please about the guided dive experience, please see Melbourne Guided Dives and FAQs About Melbourne Diving.

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