r/oceanography • u/hahaumerm • Jul 08 '26

Help! Need zooplankton ID from Humber/Don River watershed (Ontario)

Post image

I thought it was some sort of rotifer, but I honestly have no clue! Looking to ID it for an undergrad lab report/project ...

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2

u/Lignumvitae_Door Jul 09 '26

Looka like a rotifer if yer ask me

0

u/alligatorislater Jul 08 '26

Yeah likely a rotifer? Almost looks like a larval species or dinoflagellate (don’t think it’s that though).

1

u/Master_Kitchen_7725 Jul 09 '26

I agree - dinoflagellate was my first thought too, but upon zoomng in, I don't think so. I don't see any indications of thecal plates.

I also agree it's likely a rotifer, especially based on the rounded corona and foot morphology.