Placograda


 * placogrades** are small, flat-shelled animals with two to six eyes (and any number of light sensing organs).

placogrades are hermaphrodites, containing both male and female gonads. placogrades reproduce by laying eggs that are then fertilized by a partner. larvae then hatch into small, thinly shelled plankton, unable to direct themselves out of the current. most placograde larvae die before reaching maturity, their only protection being the massive clutches adults lay, usually 200-400 at once.