One of Mandurah's oldest dolphins passed away on the weekend.
Zero One, who was thought to be in his late 30s, survived several strandings and at least one shark attack.
Estuary Guardians Mandurah reported the death on their Facebook page.
"Yesterday elderly dolphin Zero One was found deceased in the lower reaches of the South Dandalup river, near where it meets the upper Murray River," the post read.
"01 was the senior member of (what seems to be) the highest ranking male alliance the King's Crew and still chasing the girls in his last weeks.
"It is likely 01 has fathered many of our present dolphins."
Mission Australia celebrates 25 years of supporting young people through Mandurah Reconnect program
'Mad Eagles fan' wins $6 million Lotto prize
Mandurah woman loses everything in house fire
Gift card scams surge past $1 million prompting urgent warning from Consumer Protection
Secret Harbour by-election attracts record 16 candidates
Major party candidates locked-in for looming Secret Harbour by-election
Comet Bay Primary to offer full-time kindy from 2027
North Dandalup crash claims life of driver
Date set for Mandurah's Town Ward Extraordinary Election