The Broome peninsula has a magnificent coastline.

Stretching back through geological time, the Broome sandstone harbours 130-million-year-old dinosaur footprints with profound meaning to traditional custodians. Then there are the 2,000-year-old human ones. Cultural treasures that feature in ancient stories are embedded in the rock and coastline. Registered Aboriginal heritage sites abound along the coast, middens attesting to the food riches sustained over millennia.

The reefs, with more than 40 species of coral, are gems of colour, shape and size, home to Clownfish, octopuses and anemones. Stand at Entrance Point at the right time and you can see Humpback Whales steaming past, Snubfin Dolphins hunting the Roebuck Deeps and, around the corner at Simpson's Beach, endangered sawfish skim for food and schools of salmon swim for their lives along the shore.

Recent photographs of previously undocumented animals (undoubtedly known to First Nations people), such as an unusual crab and poisonous anemone, show how little we know and how rich this tropical coastline is. During a recent visit to Reddell Beach (remember the marina planned for it?) with a marine biologist, we saw a Leopard Ray shoot off from our feet, a turtle pop its head up and birds dive-bomb fish balls – “It's so good to see this ecosystem is healthy; down south they're trashed,” was the comment.

With such a rich natural and cultural history, wouldn't we be protecting it? 'No' appears to be the answer from the state government, with its support for the plan to build an industrial floating jetty that would cut through the popular, rich reef of Entrance Point.

Just around the corner, plans for a unique Broome beach, bookended by sandstone headlands, are to cover it in 10 metres of concrete. In front, where we can now see Gourdon Bay across the turquoise waters of Roebuck Bay, would rise a 12-metre rock wall to serve as a breakwater. The estimated costs to taxpayers three years ago - $77 million. Inflation and a tradie shortage make it more than $100 million now. The purpose - to allow tinnies a few extra hours in the day to launch and for inexperienced boaties to bring in vessels when they haven't checked the weather and tides and find they're in trouble.

As locals born and bred here keep saying, if you can't launch and retrieve a boat safely now, you shouldn't be in the ocean without an experienced hand with an understanding of tides and wind around Broome. Instead of destroying one of Broome's most beautiful recreational beaches full of marine life and geological treasures, a memorial site for loved past residents of Broome, for $100 million, let's spend it on looking after Country and people.

You can help protect Entrance Point Reef by sending a message to Premier Roger Cook and Minister for Ports David Michael here.

Photos of Entrance Point Reef life: Sharmaine Donnelly. Photo of Broome locals protest: Damian Kelly.