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Of course I do. Who doesnt :)

The answer depends on the indended use. For identification "it is necessary to have a combination of drawings or photographs and notes from life, a whole mount where possible, and sections for anatomical reconsitruction"

"fixation for light microscopy is achieved with most standard fixatives. Fr large worms formalin (around 8% by volume) is suitable.

"for most microturbellarians there is little point in making whole mounts except to preserve and reveal hard structures for fixation often renders most anatomical details unobservable"

Quotes from Higgings & Thiel, "Introduction to the Study of Meiofauna".