▁is ▁also ▁pa ed omorphic , ▁with ▁m ature ▁adult s ▁retain ing ▁some ▁characteristics ▁of ▁lar va e . ▁The ▁genus ▁name ▁Pa ed og ob ius ▁is ▁inspired ▁by ▁this ▁trait . ▁The ▁adult ▁female ▁la cks ▁a ▁pel vic ▁fin . ▁ ▁The ▁adult ▁female ▁and ▁both ▁types ▁of ▁male ▁generally ▁measure ▁between ▁ 1 . 1 ▁and ▁ 1 . 2 ▁cent im eters ▁long . ▁The ▁fish ▁is ▁el ong ated ▁and ▁com pressed ▁in ▁shape . ▁It ▁has ▁a ▁rod like ▁pel vis , ▁with ▁left ▁and ▁right ▁hal ves ▁not ▁connected . ▁There ▁is ▁a ▁single ▁d ors al ▁fin , ▁and ▁only ▁the ▁male ▁has ▁a ▁pel vic ▁fin . ▁There ▁are ▁no ▁scales . ▁The ▁lar va - like ▁female ▁has ▁a ▁nearly ▁transparent ▁body ▁with ▁its ▁ov ary ▁visible ▁through ▁the ▁body ▁wall . ▁The ▁female ▁and ▁primary ▁male ▁have ▁upper ▁and ▁lower ▁con ical ▁teeth . ▁ ▁After ▁sp aw ning , ▁the ▁female ▁changes ▁sex ▁and ▁becomes ▁the ▁secondary ▁male . ▁She ▁grows ▁a ▁pel vic ▁fin , ▁changes ▁shape , ▁and ▁produces ▁fert ile ▁s perm . ▁The ▁primary ▁and ▁secondary ▁males ▁are ▁about ▁the ▁same ▁size , ▁but ▁the ▁secondary ▁male ▁is ▁more ▁robust . ▁The ▁head ▁is ▁rounded ▁rather ▁than ▁com pressed , ▁and ▁the ▁head ▁and ▁j aw ▁b ones ▁are ▁larger . ▁The ▁teeth ▁are ▁much ▁larger , ▁like ▁can ines . ▁The ▁body ▁is ▁more ▁p ig ment ed . ▁ ▁This ▁small ▁fish ▁is