Poseidon

Each image is a sea creature that includes a non-sea creature's name. Each of the authors at the bottom wrote books with title animals who are these non-sea creatures. Use the authors to order the animals and index into the names of their title characters:

Sea CreatureAnimalAuthorCharacterEnumerationLetter
sea horsehorseSewellBLACKBEAUTY(4/11)C
tiger sharktigerWattersonHOBBES(1/6)H
sea monkeymonkeyReyCURIOUSGEORGE(4/13)I
sea lionlionLewisASLAN(3/5)L
catfishcatDavisGARFIELD(8/8)D
elephant sealelephantde BrunhoffBABAR(3/5)B
water bearbearMilneWINNIETHEPOOH(5/13)I
frogfishfrogTwainDANLWEBSTER(11/11)R
wolffishwolfLondonWHITEFANG(4/9)T
sea spiderspiderWhiteCHARLOTTE(2/9)H

The answer is therefore CHILDBIRTH.