Hi was looking at the thread which spiny eel is best for me . It looks like the surviving eel sent to me is the siamensus which gets to about 8" I was just browsing ebay now some sellers have eels listed as macrognathus siamensus but using internet photos of the macrognathus aral which I saw can grow quite big I realy think sellers should use photos of the actual fish they are selling as you could end up getting the wrong fish like me getting the tyre track eel and peacock eel instead of a yellow tailed spiny eel it is a real mine field out there I tell you this forum is a gold mine of information