The stranding follows the successful rescue of two dolphins from Strangford Lough two days earlier.
"The way you do that is you get a tarpaulin," Ms Free explained.
"When we let go of the mother and calf the mum had a lot more strength and the calf, unfortunately, was still being pushed back onto the sand bank because of the strength of that tide."If the team had "just allowed it to carry on fighting the tide relentlessly, it might have actually been a lot worse for the little dolphin," Ms Free added.
She described it as "an incredible group effort" and praised her fellow rescuers for their quick thinking and "muscle power".
Ireland Latest News, Ireland Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
- Abde Ezzalzouli: The Moroccan dribbler with a point to prove at BarcelonaAfter a promising season on loan at Osasuna, the winger has a chance to break into Barca's first team - but it won't be easy
Read more »
Derby County promotion pain parallel Craig Bryson aims to break at East KilbrideThe Rams legend is on the backroom team at EK and believes they have what it takes to end their stay in the Lowland League
Read more »
Former Strictly star reveals experience banged up in county prison for TVA former Strictly Come Dancing star has revealed what it was like to be locked up in prison – as part of a TV show.
Read more »
Andy Cole makes Paul Pogba point as he gives verdict on Antony's Man United formAntony has had a mixed start to his Man United career after arriving from Ajax for £81.3m last summer
Read more »
In photos: Co Tyrone wildlife photographer shows off best snaps from the countyOne local photographer has specialised in capturing some of the best shots of wildlife throughout the county
Read more »