Ar hyd arfordir prydferth Penfro, roedd yr haul hydrefol yn goleuo'r traethau a'r cildraethau gyda golau ambr.

Along the beautiful coastline of Penfro, the autumn sun illuminated the beaches and coves with amber light.

Roedd Eleri yn sefyll ar ben clogwyn uchel, ei llygaid yn gosod ar y môr glas.

Eleri stood on a high cliff, her eyes fixed on the blue sea.

Roedd hi'n gyfarwydd iawn â'r lle hwn, mor lynedd â’i hawyrgylch.

She was very familiar with this place, as old as its atmosphere.

Yn ei chalon, roedd angerdd dwfn am fywyd morol a'r cemeg arbennig sydd yn y cerryntoedd tanddwr yma.

In her heart, there was a deep passion for marine life and the special chemistry in the underwater currents here.

Roedd eleni yn flwyddyn heriol i'r mudiad cadwraeth.

This year was challenging for the conservation movement.

Cyllideb tynn, a siarad cyson am doriadau, oedd y brif sgwrs.

A tight budget, and constant talk of cuts, was the main topic.

Roedd Carys, pennaeth profiadol y tîm, yn bryderus.

Carys, the experienced head of the team, was anxious.

Roedd iddi hanes o delio gyda phrosiectau a fethodd, ac felly roedd hi'n ofalus iawn am unrhyw gynlluniau newydd, yn cynnwys syniad Eleri am gydlynu prosiect i ddiogelu'r riffiau cwrel.

She had a history of dealing with failed projects, and so she was very cautious about any new plans, including Eleri's idea to coordinate a project to protect the coral reefs.

Er i Ddafydd ymuno'r tîm yn ddiweddar, roedd yn llawn brwdfrydedd.

Although Dafydd had joined the team recently, he was full of enthusiasm.

Roedd am brofi ei hun.

He wanted to prove himself.

Efallai bod ei brofiad yn gyfyng, ond roedd ei ewyllys ymroddgar yn amlwg.

His experience might have been limited, but his dedicated will was evident.

Roedd yn ystyried Eleri fel mentor, ac awyddodd camau ymhellach na’r helpu gyda’r gorchwilio.

He regarded Eleri as a mentor and wanted to take steps beyond just assisting with the research.

Mewn cadair stormus o benderfyniadau, rhaid oedd i Eleri benderfynu.

In a stormy chair of decisions, Eleri had to decide.

A ddylai hi fynd ar ymosodiad ar wleidyddiaeth gyllido, neu ddylai hi gydweithredu gyda Dafydd a fentro coll arloeswyr credyd?

Should she launch an attack on funding politics, or should she collaborate with Dafydd and risk pioneering credit loss?

Ar hyd y dyddiau aeth hi'n dal i ystyried ymateb Carys.

Throughout the days, she continued to consider Carys's response.

"Mae angen inni gydweithio," roedd Dafydd yn awgrymu, ei lygaid llyfn yn byrlymu.

"We need to work together," Dafydd suggested, his smooth eyes bubbling.

"Gawn ni greu argraff gyda'n gilydd.

"We can make an impression together."

" Gwyddai Eleri yn ei chalon fod hyn yn wir.

Eleri knew in her heart that this was true.

A'r ysbrid hwnnw o gydweithrediad wnaeth arwain i ddigwyddiad anhygoel.

And that spirit of collaboration led to something incredible.

Ar ddiwrnod y gynhadledd arfordirol, pan orfododd y cynlluniau i ddod yn fyw, cwrddodd Eleri a Dafydd â'r rhoddwyr am y tro cyntaf.

On the day of the coastal conference, when the plans had to come to life, Eleri and Dafydd met the donors for the first time.

Roedd y cyfarfod hwn yn cynnig cyfle anhepgor i argyhoeddi cefnogwyr pwysig ac arwyddocaol.

This meeting offered a crucial opportunity to convince important and significant supporters.

Wedi i Eleri gyflwyno'r achos, yn serennu gyda'i gwybodaeth ac angerdd, siaradodd Dafydd hefyd gyda brwdfrydedd a ymroddiad.

After Eleri presented the case, shining with her knowledge and passion, Dafydd also spoke with enthusiasm and dedication.

Syniodd y rhoddwyr, sy'n cael eu denu gan ddioddefaint Eleri a sicrwydd Dafydd, â sicrhau yr arian.

The donors were impressed, drawn by Eleri's earnestness and Dafydd's assurance, and secured the funding.

Roedd Carys yn gwylio, wedi ei llethu gan feddwl newydd: cydweithio, dyma ffordd ein dyfodol.

Carys watched, overwhelmed by a new thought: collaboration, this is the way of our future.

Wrth i'r arian hedfan i mewn, teimlodd Eleri bleser mawr.

As the funds flew in, Eleri felt great pleasure.

Nid yn unig hadau'r prosiect oedd yn cael eu plannu, ond y gwir werth o lwyddiant ar y cyd.

Not only were the seeds of the project being planted, but also the true value of joint success.

Cafodd yr holl brawf y noson honno ei ddathlu wrth y morlin, wrth i'r haul diflannu i'r gorwel.

The entire trial was celebrated that night by the shoreline as the sun disappeared over the horizon.

Roedd y teimlad o orfoledd ymysg y tîm yn amlwg.

The feeling of jubilation among the team was evident.

Roedd Eleri wedi dysgu gwers bwysig: gallai rhannu llwyddiant, a chydweithio gyda'i gynghreiriaid, arwain at gyflawniadau hyd yn oed mwy.

Eleri had learned an important lesson: she could share success, and collaborating with her allies could lead to even greater achievements.

Roedd gofal am Gymru, a'i hyfrydion, yn dwyn ffrwythau a'r gobaith am ddyfodol disglair ar y gorwel.

The care for Cymru, and its beauties, bore fruit and the hope for a bright future on the horizon.