Rhipsalis Mesembryanthemoides aka the clumpy mistletoe cactus.
Rhipsalis is a genus made up of 35 different species and belongs in the same family as other types of cacti. Rhipsalis prefer a warm but humid environment and indirect, lower light conditions.
He likes to be in bright, indirect light, don't let him get full sun at peak times in the day.
Give him a good water once the soil is dry, he won't like soggy soil. Feed once a month in spring summer and every other month in winter.
He likes humidity so a mist won't go a miss.
He's toxic to pets and children.