One of the most interesting aspects of earthworms is their sexuality. Earthworms are simultaneous hermaphrodites , meaning worms have both male and female reproductive organs. During sexual intercourse among earthworms, both sets of sex organs are used by both worms. If all goes well, the eggs of both of the mates become fertilized.
One morning I noticed two worms stuck together on the ground. Before I got a good eyeful, my dog rudely interrupted them and they hastily retreated into their burrows. Were they soil mates discussing Nietzsche or niches over a cup of dirt? Being hermaphroditic enhances the chances of finding a suitable mate for creatures like worms, with limited access to partners or the internet. And they may prefer a partner because mixing genes is a good way to hedge genetic bets in ever-changing environments.
Giant Gippsland Earthworm. No-one has ever caught Giant Gippsland Earthworms GGEs in the act but it seems they like the lights out as it all appears to occur underground within their burrows. Each worm has both male and female sex organs. However, two worms are required for mating as they exchange sperm with each other.
An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan , are externally segmented with corresponding internal segmentation, and usually have setae on all segments. It has a double transport system made of coelomic fluid that moves within the fluid-filled coelom and a simple, closed circulatory system.