The first one is an albino version of number 5,
. I don't think either form has an L-number at all.
Number 2 is
- no L-number. So is the last one (but not albino of of course).
The albino cory is MOST likely
The peckoltia is harder. Possibly
, but far from sure. There are quite a few with spots on the head, and they are quite difficult to tell apart with just a partial photo.
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Mats