Sentence:  There were Port Jackson sharks with a brown back, a whitish belly, and eleven rows of teeth, <WSD>bigeye</WSD> sharks with necks marked by a large black spot encircled in white and resembling an eye, and Isabella sharks whose rounded snouts were strewn with dark speckles. 
Meaning of the word marked with <WSD> tags:  Any of certain fish or shark species identified by their large eyes, in particular (bigeye tuna), (noshow=1).