Tries in the final 10 minutes from forwards Wenceslas Lauret and Arnaud Heguy took the French side to an ultimately comfortable win over 14-man Treviso.
The visitors were a man down from the 24th minute, when flanker Francesco Minto was shown the red card with his team leading 6-0 through two Kris Burton penalties.
Burton split the posts twice more before Julien Peyrelongue cut the deficit to 12-3 at the interval, but Iain Balshaw's 44th-minute try brought Biarritz back into contention.
Replacement Dane Haylett-Petty put the French side ahead for the first time at 15-12 and flanker Lauret and hooker Heguy saw them to a bonus-point victory.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.