Broome has huge tides and it is very hard to explain or for someone to understand the extremes unless they have experienced it for themselves. With a tidal movement of up to 10 metres (over 32 feet) in height there is a tremendous amount of water coming and going during these tides. Areas of reef that would otherwise remain covered will become exposed and the birds will anticipate the chance of feeding in areas that are beyond reach at lower tides. If you sit and wait for the tide to drop you actually hear the silence broken as the water rushes back over the reef and the birds immediately take flight to reach the upcoming exposed areas. They are aware that they can land in shallow water and before long they will be on exposed reef. It is on these occasions that we take the opportunity to explore the reef in dive boots. The small compact bivalves cover the reef and as you walk across the reef you discover there are pools left behind full of all sorts of creatures. When you consider that everything on the reef has to survive these extreme tidal movements and the storm surges during our cyclone season it is even more remarkable that the coast off Broome has so much to offer beyond the bird life.

Reef at low tide

Exposed reef

As we are already into May we have seen most of our migratory shorebirds head north, but there are still a few that are going to be heading off in the next fortnight and they are feeding up for their journey. The Ruddy Turnstones will migrate, but the Pied Oystercatchers will remain in Broome all year. This pair below normally lay their first eggs in July each year.

Ruddy Turnstone

Pair of Ruddy Turnstones exploring as the tide recedes

Pied Oystercatchers

Pair of Pied Oystercatchers feeding at low tide

As you walk out on the reef you soon discover a huge variety of creatures and several pools are the perfect environment for clams.

Six large clams

Six large clams

The most common sea shell present is the Cowrie and there are numerous sizes and colours across the reef. They appear to either be absent or present, but it is not obvious why certain areas are preferred to others.

Cowrie (2)


Large Cowrie

Cowrie shells on the reef

Star fish are fairly common in the pools and they vary in colour from bright orange to a more patterned variety as seen below.

Star fishStar Fish

There are a variety of Sea Cucumbers and Feather Stars that brighten up the edges of all of the pools.

Feather Star & Sea cucumber

Feather Stars and Sea Cucumber

A rather odd creature, the Sea Hare, is either absent or abundant. They are well disguised, but they emit a bright purple ink if they feel threatened and soon turn the water an inky purple colour.

Sea Hare

Sea Hare

We are not exactly sure what this creature is, but possibly an anemone. It moves freely across the sand and through the water most likely feeding as it goes.

Reef creature

Possible anemone

Tube worms of varying shape and colour line the edges of the pools and open and close as you pass by.

Tube worm

Tube worms

Every pool offers different creatures and no doubt some are eaten by the variety of shorebirds that reside at the location and the ability to enjoy exploring on foot is a pleasure in itself. The tide chart does need to be observed firstly, because once the tide turns this reef goes under very fast. The shorebirds can escape in flight, but you wouldn’t want to be suddenly trapped out here with a tide racing in. The ideal tides are always in the late afternoon and offer the perfect alternative to a walk on a sandy beach, which in itself is a pleasure, but variety is the spice of life!

Written by Clare M
Clare and her husband, Grant, have lived permanently in Broome, Western Australia since 1999 after living in various outback locations around Western Australia and Darwin. She has lived in the Middle East and the United States and traveled extensively in Europe. She monitors Pied Oystercatchers breeding along a 23km stretch of Broome's coastline by bicycle and on foot. She chooses not to participate in social media, but rather wander off into the bush for peace and tranquility. Thankfully she can write posts in advance and get away from technology!