Porites, porites and ...porites?

[dendro982]

I have different Christmas tree rocks, are all of them porites? Or specify which porites.

1. Common kind, large brown polyps:

2. Could be the same, but polyps are smaller. Same brown:

and greenish:

3. Unknown frags, looks alike, but vertical growth, not boulder:

4. Greenish in a good light, but general impression as brown:

5. Sand colored, different:

6. Green:

 

[dots]

Oh man, there are about as many encrusting porities and montis as acros........

Try "Corals of the World" by Jen Vernon.