>>51091788A small number of shark species have to swim or they'll drown (slowly), most don't and they're all capable of period of inactivity and rest. Spoink has to manually pump its heart by bouncing, going into cardiac arrest is far more damaging and painful than mild drowning and has a fair chance of immobilizing the victim during the attack meaning Spoink not bouncing can cause a cascade effect where it goes into cardiac arrest and can't correct it so it'll just die.
