Last week I gave you this specimen from the Grant Museum of Zoology Micrarium to try your hand at identifying:
I enjoyed the variety of entertaining answers, ranging from a preschool drawing of a grandma with a beehive hairdo to a larval Alien, but I was also impressed by the range of cryptic clues about the identity of the specimen.
A favourite was a reference to “dealing with a pea covering” or variations on that theme, which gives us “Cope” and “pod”, which is what this is – a Copepod (which means “oar-foot” in Greek). For those of you unfamiliar with copepods are small crustaceans, many of which live as zooplankton and that as a group may make up the majority of the Earth’s animal biomass. They’re tiny, but there are countless billions of them.
This one isn’t as tiny as many of its relatives, because it has a rather different lifestyle to planktonic forms. This is a sea louse and it’s a parasite of fish. They feed on the mucus, skin and blood of fish and if they reach high levels of infestation they can be a real problem, potentially killing fish. This particular specimen has two trailing egg cases, which I think threw some of you. It was removed from a Brill and as Daniel Calleri recognised from a visit to the Grant Micrarium, it’s Lepeophtheirus hippoglossi (Krøyer, 1837).
If you’ve been to the Grant Museum and have photos from the Micrarium, or if you have any photos of tiny animals, you might fancy entering a Twitter and Instagram competition by sharing them with the hashtag #MicroMultitudes, Have fun with your photos!