4 unknown worms observed
Weir Farm 2016 BioBlitz
I was on a holiday in Akumal, Mexico and spent most of it on the tide pools or in the ocean. This is live imaging of a "blue nematode" I found in the ocean next to a rocky shore line - I images this live with a Foldscope (140X). Background sounds are waves hitting the shore. This observation has been a mystery to me for almost a year; and I showed this to several people - but never got an ID. The mystery is the sharp color change from deep blue to brown - so characteristic, that it can't be mistaken. It was also found around "bluish algae" so I had a theory that the color could be symbiotic. Scale bar is 100 um width of the worm. Also visible is the "red" (eye?)spot.
For details and a full video of the live nematode - see Microcosmos post at: https://microcosmos.foldscope.com/?p=7759
The nematodes /ˈnɛmətoʊdz/ or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a very broad range of environments. Nematode species can be difficult to distinguish; and although over 28,000 have been described, of which over 16,000 are parasitic, the total number of nematode species has been estimated to be about 1 million. Unlike cnidarians and flatworms, nematodes have tubular digestive systems with openings at both ends.