some fish to ID and sex

[pumbus]

here are some fish i would like either idintifiyed or sexed

i only need the angel and rainbow sexed,as for the pleco and geo i would like to know what type they are and sexed if possible
thanks in advance,i have another rainbow but i coulden't get a shot

\

as for the black mark on the rainbow i just noticed it today,he/she must of scraped off something

 

[soggysandwich]

in the second pic those look like german blue rams the females have a pink belly the males dont. here's some info http://www.aquariumadvice.com/profiles/6_16_en.html

 

[pumbus]

yea i know about the rams,the stuff i need sexed are all of them(rainbow,angel,geo,pleco) but i only need the geo and pleco id'ed

 

[WyldFya]

The pleco is just a common pleco. As to the angel it is just a silver angel, and it is not possible to sex angels until they lower their sexual papilla.

 

[pumbus]

yea i kinda figured it was a common pleco,didn;t know that bout the angel though

 

[straitjacketstar]

The pleco is not L. pardalis but one of the "old school" common plecs, like the actual Plecostomus hypostomus. (<not sure if that name's changed in recent years)
The angel will be hard to sex visually despite any "technique" you choose to use. It looks smaller than 3" (maybe about 1.5-2" in body length?) which is not even old enough to be sexually mature. You'll really have to wait to be sure but if you want to go by "visual tells" based on the shape of the stomach, surve of the vantrals, redness of the eye - you'd probably turn up male. All the factors above are ones I would not trust to sex a fish even close to 100%.
I don't have a clue as to the sex of the rainbow, looks a bit young and stressed.
The Geo is Gymogeophagus balzanii.