You'd think it was pretty cool, according to two Coffs Coast mums.
Bellingen's Diana Carr and Coffs Harbour's Heidi Watson both said they would be happy to be 'given' a grey nurse shark and thought it was a great idea.
But Ms Carr said while she would be happy to give both her own mother and her mother-in-law a shark, she was not sure how they would take it.
She said she might have to give them advance warning to make sure the gift was not misconstrued.
"They know I'm a bit of a greenie," she said.
Heidi Watson said her family tried not to buy physical gifts, but to donate to bush regeneration and Landcare.
She said she thought more and more people were interested in gifts like that as opposed to 'buying mugs'.
The Nature Conservation Council of NSW is encouraging people to adopt a critically-endangered grey nurse shark for Mother's Day.
The $75 cost goes towards protecting the dwindling East Coast population of this fearsome-looking creature, which may have as few as 250 mothers among its population.
Each shark 'parent' receives an adoption certificate, a grey nurse shark temporary tattoo and poster, the opportunity tot name your shark and register it one a website a CD with games, fact sheets and images and quarterly research updates.
The seas around the Solitary Islands are one of the principal habitats for grey nurse sharks.