Ironegg, Nequito and Plasquito

Ironegg: As its DNA develops, it dwells within its steel egg shell. The red pedipalps anchor it to the river bed.
 
Nequito: Using a radar in its system, it searches for various nectar to feed on. All Nequitos are males and can be found near rivers.
 
Plasquito: The female of the evolutionary line, they are aggressive and have a lust for blood. Their antannae detect the electric pulses released by all life forms and follow the signal to find prey.