marine Leech - Lembeh
I had no idea there were Leeches underwater, until i just ID'd this yesterday. I saw this on my last dive in Lembeh, on some sandy rubble at 5m. It was about 1.5cm, and at first i thought it was a seahorse as it moved slightly, with its tail curled up. Then i thought it could be a nudibranch, maybe a Sapsucking nudibranch of some kind. But now i realise its a Leech, not sure about the species though.