I grew up with those giant pests hibernating on the walls of the cool side of the house. Heard they were edible but it seems to be taboo here. I have a mental barrier to eating them but I'm sure they're quite delicious. Someday, who knows....
Turns out there are 4 species of giant African snails, 3 are native to Ghana and considered a delicacy, the fourth and the one we have here and in Florida, Achatina fulica, is from Ivory Coast, and while edible is not considered a delicacy and eating it is avoided.
"Three species of Achatinidae are eaten in Ghana (Monney, 1994). Achatina achatina is
specially a delicacy to the snail consuming Ghanaian populace, followed by
Archachatina marginata, and then Archachatina degneri in descending order of delicacy.
Achatina fulica, though nutritious and edible (Monney, 1994), is bluntly avoided by most
snail eating Ghanaians, and with its very high turnover rate, it is appears to be a nuisance
to some people"
From
http://www.petsnails.co.uk/docs/asamoharep.pdf