Wales back Mared Evans directed proceedings expertly for Quins.
Mared Evans, an ex-UWIC student, came back to haunt the Cardiff Met Students, guiding her side to a 5-29 win.
Evans produced a fine display of decision making delivering passes to execute back line plays to create four unanswered tries with one conversion by half time.
The possession she received gave her the platform to attract defenders then putting oncoming runners into space - there was no better example than Caryl James coming off her wing to power through using her explosive pace to great effect.
Cardiff Met however put up a much better display at the scrum with the lineout again being a positive, however the Quins backline scuppered any chances or opportunities for a score until midway through the second half with vice captain Carys Phillips powering over from 10 metres out to score the Students only try.
Cardiff Met. Freshers Kitty Newton, Alice Griffiths, Charlotte Mayfield, Charlotte Myrans, Joanne Jones, Iona Evans, Lois Wynne - Williams, Megan Jones all making their debuts for the University and playing their part in a strong second half with Quins coming out on top 7-5.
There were some good battles up front with the back row department where Becky Newton and Catrina Nicholas went head to head with Delyth Davies and Carys Phillips in the mix of a very competitive contact area and around the field.
Cardiff Met now look forward to an away game at Pontyclun next Sunday.
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series