Assertion: horseshoe crab's eye | /r/HasProperty | located near the mouth
Facets:
value: to assist in hunting
type: PURPOSE
value: to assist in swimming
type: PURPOSE
value: on the underside of their carapace
type: LOCATION
Source sentences:
text: Two very simple eyes are located near the mouth, on the underside of their carapace, but their function is not clear.
text: Two ventral eyes are located near the mouth but their function is unknown.
text: In addition to the 7 eyes on the shell, there are also a series of photoreceptors (i.e. light sensors) on the telson that helps the horseshoe crab maintain a circadian rhythm (i.e. day and night cycles), as well as two ventral eyes located near the mouth to assist in swimming and perhaps hunting efficiency.