Toulouse are in the relegation zone after suffering a 1-0 defeat at Lens on Saturday following an embarrassing 6-1 thrashing at home to Marseille.
President Olivier Sadran confirmed that former Toulouse defender Arribage has taken the helm, with Casanova's seven-year reign coming to an end on Monday.
Arribage, who was working as a scout for the club, will be assisted by Teddy Richert and Michael Debeve - also former Toulouse players.
The 43-year-old's first game in charge will be a home clash with high-flying Bordeaux on Saturday.
‘Maybe I’ll be signed by Wrexham, who knows? English football would suit me – if an offer came, I wouldn’t think twice, I’d go immediately’ Euro 2024 cult hero reveals his UK dream
‘Managing Leeds? It was an option that appeared, but it wasn’t the right timing. I decided it wasn’t a good idea to leave the club I was at mid-season’: Premier League boss admits to turning down opportunity to replace Jesse Marsch in 2023
