Submarine volcanoes do not have the same interest to media as volcanoes on land.
One reason is because there normally are not any large cities beneath such a volcano....
(at least, not to our knowledge), and therefore no threat to humans.

That they are not dangerous because they are under the sea-level is not true.
After having learned about "Kick 'em Jenny", we am sure you agree.

So, since submarine volcanoes also are volcanoes, but in a way sometimes
even more interesting, we will try to introduce them to you here.
Of course, there are lots of other web-pages on the net, and the sub-volcanoes
even have their own fans, so doing a little surfing on the net will surely give results.

Bayonnaise
Ferdinandea / Graham
Gakkel Ridge
Gorda Ridge
Jack
Kavachi
Kick 'em Jenny
 Marianas Arc
Marsili
Panarea
Rumble III
Terceira
Vailulu'u