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Leech in shallow pond

Observed: 3rd September 2013 By: Nick UptonNick Upton’s reputation in InvertebratesNick Upton’s reputation in InvertebratesNick Upton’s reputation in InvertebratesNick Upton’s reputation in Invertebrates
Leech (Helobdella stagnalis) a predator of freshwater invertebrates reaching out from a Delicate stonewort (Chara virgata) alga in a shallow pond, with eggs crried in a ventral sac, Wiltshire, UK, September.
Helobdella stagnalis head
Leech (Helobdella stagnalis) a predator of freshwater invertebrates reaching out from a Delicate stonewort (Chara virgata) alga in a shallow pond, with eggs crried in a ventral sac, Wiltshire, UK, September.
Description:

I recently photographed this small (8mm in a blob, 2 cm extended) leech in a shallow pond (among stoneworts), carrying very obvious eggs in a ventral sac. I think it may be Helobdella stagnalis, a predator of snails and fly larvae, based on the egg sac and coloration (fairly translucent, greenish, with longitudinal patterning of black dots and obvious segmentation), but hope someone can confirm / correct my ID. I have no clear top shots showing the yes, but think a hint of paired dark eyes is visible from below in one crop.

Identifications
Species interactions

No interactions present.