I have found a small blue 'skeleton/head' like structure on my sandbed all other animals accounted for (1 diamond goby, 2 cleaner shrimp, 1 emerald crab, and several snails) except my six line wrasse. Is this his skeleton or do you think he could be hiding really well? The structure is hard, symmetrical, bright blue, no flesh attached.
I am very curious as to why it is such a bright color blue. Anyone have some insight as to why? Aren't calcium based structures primarily whitish? I know that calcium is essential for muscle contractions and nerve conductions in action potentials (my prof. would be so proud!!) If not calcium what is the it composed of that can take calciums place? Is there a chemical morphilogical reason for the pigment?
I am very curious as to why it is such a bright color blue. Anyone have some insight as to why? Aren't calcium based structures primarily whitish? I know that calcium is essential for muscle contractions and nerve conductions in action potentials (my prof. would be so proud!!) If not calcium what is the it composed of that can take calciums place? Is there a chemical morphilogical reason for the pigment?



