Ten adult male migrants from West Africa drowned off the coast of Gran Canaria island after their boat capsized, Spanish rescuers say.
Migrants regularly risk a perilous voyage from West Africa
Five bodies were found floating near a beach and five more were recovered by divers on Friday.
Spain's Civil Guard said six other adults survived from the boat, believed to have been carrying at least 18.
In 2006 an estimated 30,000 migrants were caught trying to reach the Canary Islands in open boats from Africa.
An EU agency, Frontex, has begun operations to help Spain, Italy and Malta intercept migrant boats, but EU officials say it needs more resources.