Quote:
	
	
		| 
			
				...(and I do not know if anyone really knows the distinction between adult and juvenile all that precisely ... perhaps Daniel Knop would)
			
		 | 
	
	
 <font size="2" face="Verdana, Helvetica, sans-serif">I've read around 4" in size is where a 
Tridacna sp. clam begins to rely more on its zooxanthellae.