Mandurah has welcomed its first dolphin calf for 2022.
The newborn's mother is a local inshore coastal dolphin and the birth was her first.
"The birth heralds the start of the dolphin calving season here in Mandurah and there are a number of pregnant dolphins in both our inland resident dolphins and inshore coastal dolphins due to give birth over the next few months," an Estuary Guardians Mandurah spokesperson said.
Dolphin research scientist Doctor Krista Nicholson said each year in the estuary between five and 16 calves are born.
She is urging boaties to take extra care when out in Mandurah's waterways.
"What we need to be mindful about is that newborn calves are very small and they don't know their way around the estuary or around boats, so we encourage all boat users to keep an eye out and keep their distance," Dr Nicholson said.

Mayor reassures community after 13 trees removed from old King Carnival site
State Government invests $5 million to help restore Peel-Harvey Estuary
Part of Kwinana Freeway at Stake Hill closed for hours after truck crashes into overpass
Woman charged with alleged murder of baby in Baldivis
Bridgetown artist takes out top prize in 2025 Rockingham Castaways Sculpture Awards
'I am deeply sorry': WA Governor formally apologises over 1834 Pinjarra Massacre
Port Kennedy man charged with reckless driving after youths spotted hanging out car windows
Peel region businesses, organisations encouraged to apply for new round of RED grants
Record breaking attendance at Luca's Legacy clean-up with 500kg of rubbish removed from Mandurah's waterways