No, the string of bananas and the string of dolphins are two separate plants, though they are closely related and belong in the Asteraceae family. The string of dolphins is a hybrid of the string of pearls and the hot dog cactus (Senecio Articulatus), both members of the genus Senecio. While the string of bananas and string of dolphins look very similar at first glance, their leaves have a striking difference. The string of dolphins’ leaves are oblong, just like the string of bananas, but they have a small bump on the edge of their leaves, which bares a striking resemblance to a dolphin’s fin!