Are these babies little specs on the glass like baby snails?  I would suspect that they hitchhiked over fromthe big one you bought, rather than 'mommy' giving birth two 2 abalones.   
Quoted from a website: 
 
"Sexes are separate and fertilization is external. The eggs and sperm broadcast into the water through the pores with the respiratory current. A 1.5 inch abalone may spawn 10,000 eggs or more at a time, while an 8 inch abalone may spawn 11 million or more eggs." 
		
	
		
		
		
		
			
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				George
			 
		
		
		
		
	
		
		
	
	
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