Small flatworm (visible to naked eye) collected in a temporary puddle of water. I put the samples that I collect in a jar and I've been noticing that these flatworms (two or three in total) tend to stay in the glass out of the water but close to the surface and if for some reason the water move they tend to go up to avoid it.

Pequeno platelminto (visível a olho nú) coletado em uma poça de água temporária. Eu coloco as amostras que coleto em um pote de vidro e tenho percebido que esses vermes (uns dois ou três no total) costumam ficar no vidro fora da água mas perto da superfície e se por alguma razão a água se move eles tendem a subir para se afastar dela.

A digeneid trematode from a snail host (Nassarius) . Causes cercarial dermatitis in humans.. Microscope image shows cercariae being squeezed out of a redia.
The snail's infested viscera are shown in a macro photo as well. The snail was anesthetized before shell removal/dissection.

Mag. 400x
Movements were worm-like. (Perhaps it is an annelid?) Seemed to have eggs in tow that were released by the last photo. Arrow highlights trophi (I think) in photo 2. The most endearing feature is the high-waisted hula skirt fringe... or is that an Elizabethan collar-cum-feather boa? :o) Definitely striking.

• On 3/29/2022 a water and moss sample were taken from the submerged section of a boulder in the Billings-Avery Brook. Air temp. 38F