“It is an actual honour to be signing with the Ospreys,” mentioned Nayacalevu.
“There’s some world-class expertise right here and I am wanting ahead to taking part in alongside them.
“Stepping right into a crew the place high quality expertise is mixed with thrilling potential is right for me at this stage of my profession.
“I imagine I can contribute closely to the squad this season, each on and off the sector.”
Ospreys are thirteenth within the United Rugby Championship (URC) and haven’t given up hope of reaching the play-offs by ending within the prime eight, whereas additionally they face Scarlets in Europe’s Problem Cup final 16 in early April.
Watkin suffered a severe knee harm taking part in for Wales towards France within the Six Nations opener in January and can miss the remainder of the season.
“It isn’t typically a participant of Waisea’s calibre turns into obtainable within the season,” mentioned Ospreys head coach Mark Jones.
“He brings a wealth of expertise and management credentials with him, which might solely be factor for our children coming by means of.
“We really feel Waisea could make an immediate influence and be an actual distinction for us in Owen’s absence.
“It stands us in good stead in a season the place we nonetheless have rather a lot to play for.”
