You read that right. The students' stunning victory has seen them leapfrog the Sharks and move into the top four.
Southern annihilated Green Island 71-3 to remain on top of the standings, while Harbour also made light work of Kaikorai, winning 59-17.
Pirates registered its third win this season with a gutsy 26-16 victory over Alhambra Union, and Taieri beat Zingari Richmond 44-29.
Pirates 26
Alhambra Union 16
An earlier version of Pirates might have fallen apart when the team conceded a try to Alhambra Union inside the opening minute at Hancock Park.
And the first 25min of the match gave no indication Pirates would be able to absorb the pressure.
Alhambra Union made all the play. Midfield backs Ratu Bishop and Tili Puloka exploited gaps in the defence and winger Henry Schikker made some promising dashes up the left wing.
Pirates scrambled but mostly Alhambra Union would lose possession or give up a penalty.
That eased the pressure and slowly Pirates' formidable pack gained the ascendancy. That said, it was an intercept from winger Adam Gavegan which sparked the home side.
His try was against the run of play but Pirates took control of final 15min of the half.
They dominated possession and territory and eventually flanker Motu Huch crashed over in the corner moments before the break.
Fullback Craig Sneddon drilled a sideline conversion and his kicking was to prove crucial in helping Pirates defend its 17-10 halftime lead.
He added three second half penalties to keep Pirates in front.
Lock Jared Williams was a standout performer for Pirates while Lance Barbarich kept busy for Alhambra Union.
Harbour 59
Kaikorai 17
Former Otago Boys' High School First XV team mates Aleki Morris and Sio Tomkinson helped the Harbour backline to sparkle in the team's nine try walloping of Kaikorai at Bishopscourt.
Harbour had the game in hand when it scored four first half tries to lead 24 3 at the break.
Kaikorai was not given time to settle back into its game before Morris scored the first of Harbour's five second half tries. They blitzed Kaikorai and added 35 more points.
Morris, at centre, had the skills to break the line and the speed to turn the opportunity into points.
Tomkinson, at first five eighth, added structure to the Harbour backline with his long passes and strong tackling.
The other Harbour backs to impress were halfback Tala Fagasoaia and wing Sala Halaleva.
A feature of Harbour's game was its support play. There was always a man on hand to take the next pass.
Lock Hale T Pole was strong in the lineout and was the best Harbour forward. He was backed up by No 8 Solomon T Pole, flanker Charles Elton and hooker Pete Mirrielees.
Kaikorai's poor first up tackling handed the advantage to Harbour and they made the most of their chances.
Speedy fullback Tony Ensor scored a try and was the best Kaikorai back. He was supported by lock Willie Miller who made six takes in the lineout and rugged flanker Johnny Appleby.
Southern 71
Green Island 3
Despite the late transfer from a home ground advantage and a delayed start, Southern was untroubled in its match against Green Island at the non aligned venue of Kettle Park, to remain at the top of the points table.
Apart from 20min in the middle stages of the first half, it was a match in which Southern was totally dominant.
Its scrum in the second half monstered the Green Island pack, where only the skills from No8 Jackson Hemopo rescued the side from total capitulation.
Dominance from the Southern pack led to flanker Ethan Perrett scoring the first of the side's 10 tries, after just 2min.
But Green Island rallied and despite dominating territory and possession was shut down by some superb defensive work, which in the end took its toll, as Southern ran in three tries in quick succession in the final minutes of the first half, for a 29 3 lead at the break.
Southern continued to build on this momentum in the second half, scoring a further six tries. Second five eighth Tei Walden the chief destroyer, scoring three of the 10.
First five eighth Bryce Hosie proved a vital link between forwards and backs and his contribution far exceeded the 26 points he alone scored.
Taieri 44
Zingari Richmond 29
Taieri scored three quick tries in the second half to seal its win at Montecillo against Zingari Richmond.
The match ebbed and flowed in the first half, with Taieri first five eighth Josh Casey scoring all the points for his side as it led 20-19 at the break.
Casey made the most of some holes in the home team's defence just off the ruck to scoot over for two tries and also knocked over some relatively easy kicks.
But Zingari Richmond showed plenty of fight in the first half. Nippy winger Enoke Nauvaluvalu scored an 80m runaway try after grabbing an intercept when Taieri was hot on attack.
Lachie Moore scored two tries for the colours and when he scored his second, about 10 minutes into the second half, there was only three points between the teams.
But Taieri then found some holes out wide and its outside backs ran strongly to rattle on the points. Midfield back Kori Rupene worked hard all game and was a key man in the Taieri backline.
In the forwards for Taieri, lock Kurt Webster worked hard, as did blindside flanker Vince O'Connell.
For the home team, first five eighth Thomas Johnson was busy while prop Stu Young and hooker Masiu Akauloa got round the field.
University A 60
Dunedin 8
This was supposed to be a tight, tense, absorbing encounter which would go a long way to determining the make up of the top four. Well that question was answered - University in now in the pole position to make the playoffs.
The home side ran away from Dunedin at University Oval, taking every chance that came along.
Dunedin will not want to remember this match, as it fell off tackles and showed little energy.
The Dunedin backline appeared to be playing touch at times and failed to hold on to the ball or show any continuity.
University A was up 22-0 after 17 minutes and the game was over as a contest. It dominated the lineout and even with a second string loose forward trio shut Dunedin out in that area, as well.
The students ran in some great tries and although obviously helped by the no tackling policy of the Sharks, outside backs and South Otago products Matt Faddes and Gavin Stark were simply breathtaking.
They shared six tries between them and many were long range efforts off Dunedin turnovers.
In fact, two of the tries were made from turnovers behind the Dunedin scrum and ruck by Stark.
Others to stand out for the home team were backs Shae Tucker, Fletcher Smith and Kaide Whiting. In the pack Jack Wolfreys, Jack Sherratt and Angus Williams ensured their backs had plenty of possession.
For Dunedin the less said the better, although its scrum was in the ascendancy for most of the match.
