I don't know for certain that this is a succulent but it grows in very dry soil and it has milky sap when it's cut.
It propagates exceptionally easily from cuttings.
It flowers periodically throughout the year, in partial shade or full sun, on plants about 2-4 feet tall and it attracts many hummingbirds.
The flowers are about 3/4 of an inch long and the branches are about a 1/2 inch thick. There's no scent to the flowers as far as I can tell.
It's currently growing in the Bahamas but I don't think it's a native species.
Does anyone know what this might be?
I've looked through Google images and the closest match I could find was Euphorbia tirucallii but it had different flowers and leaves.