The Thunder started strong with young gun Calvin Thorne kicking the first goal within the first 10 minutes of the match.
But South Fremantle quickly responded with three goals to two heading into the first break.
It was a tight contest early in the second quarter, with both teams applying pressure around the ball before South Fremantle kicked two goals, extending the margin to 11 points heading into the main break.
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The work of defender Sam Collins kept the Bulldogs from scoring, but South Fremantle proved too good, running away with the game mid-way through the third quarter, leaving the Thunder goaless heading into the final term.
It just wasn’t the Thunder’s day as South Fremantle continued their impressive performance, sealing the win 12.14 (86) to 5.3 (43).
Despite the loss, Fremantle’s Matthew Taberner was among the best for Peel with 18 disposals and a goal.
Teammate Hayden Crozier was also a standout, racking up a solid 15 disposals and a goal.
Fremantle Dockers’ new recruit Griffin Logue said the Thunder knew they were going to be in for a tough game against the Bulldogs.
“They really came out with a bang after their loss (the weekend before),” he said.
Logue also highlighted the standout performance of fellow Docker Sam Collins.
“He was a standout for sure down back, he’s definitely a big ruck for us, really solid,” he said.
Teammates who also stood out were Brayden Lawler, who racked up 21 disposals and a goal, and Blair Bell, who collected 15 disposals and a goal.
After the tough loss, the Thunder will be ready to fire when they face Subiaco at Leederville Oval next Saturday.
In the colts, Peel defeated South Fremantle, 16.7 (103) to 5.5 (35).
Goalkickers; 5 L Chapman, 3 L Cullen, D Cramer, 2 J Kearing, 1 L Mitchell, B Penny, T Powell.
Best players; L Riley, J Shine, J Perry, L Chapman, B Oldfield.
In the reserves South Fremantle defeated Peel, 21.15 (141) to 10.6 (66).
Goakickers; 2 J Kirby, C Hayden, B Milward, C Ugle, 1 N Hura, M Dean.
Best players; H Matthews, J Kirby, J Mcmahon, C Eddy, T Naughton.