can you sex these zebras?

[PufferXtreme]

My friend has bought 4 zebra plecs but doesn't know what sex they are.
He sent me photo's but I'm not sure what's what either!

so, please take a look and feel free to offer an opinion

 

[Aquai]

Google search found this on sexing zerba's:

The first ray of the pectoral fin is thicker in the male with odontodes (tiny spines) visible, these can also be observed just below the operculum (gill plate).

[FONT=Arial, Helvetica][FONT=Arial, Helvetica]The first pectoral fin ray is thicker in the male, and the head/pectoral region of the male is broader.

I would say 002 and 004 are male, 001 and 003 female. But hard to tell without more pictures?
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[Lutt]

Hmm i would say that nr3 is a male

1 F
2 M
3 M
4 M

 

[PufferXtreme]

bump