It appears to be an Argentinian Vampire spider, "Merda taurorum animas conturbit". They come into this country through produce from South America. They are very fond of bananas and hide in the bunches while being imported here. They reproduce very quickly usually bearing as many as 10,000 babies, which yours look like it will very soon.
They don't actually feed on blood but to like the juice from pomegranates, which has a red colored juice. They tend to die off during winter months from the cold, so don't worry about him. They make good pets. I keep them in my home.