jag123;4579382; said:
It doesn't appear that either one is leucosticta. The first one looks like it could be a mapiritensis based on the body/head shape in addition to the very small spangles on the face.
The second one looks like it could be jurupari, but both pics are quite blurry, and you really need some good detail to identify when the differences are so minute.
I wouldn't touch a mapiritensis ID based on these pics. I've kept 5 in recent years (<<< 8" TL female in my avatar). Do you know the collection point of the fish? Keep in mind the number of sp varients of non-spotted Satanoperca out there. Quick google results:
Satanoperca sp."Jaru"
Satanoperca jurupari
Satanoperca cf. jurupari "Guyana"
Satanoperca cf. jurupari "Momon River"
Satanoperca cf. jurupari "Rio Capim"
Satanoperca leucosticta
Satanoperca cf. leucosticta "Amazonas Red"
Satanoperca cf. leucosticta "Gold Spot"
Satanoperca cf. leucosticta "Gold Stripe"
Satanoperca cf. leucosticta "Rio Tapajós"
Satanoperca cf. leucosticta "Speckle-Back"
Satanoperca cf. leucosticta "Xingu"
Satanoperca mapiritensis
Satanoperca pappaterra
Satanoperca sp."Redlip" ("French Guiana") ("Amapá")
Satanoperca sp."Tocantins"
Satanoperca sp."Trombetas"