Is there an animal that doesn't feel pain?

All animals (and perhaps all living things in general) need to respond to negative stimuli in some way or another. However, not all animals will feel "pain" like we do. Human/mammal pain goes deeper and the suffering can be much more intense. However, some animals lack consciousness and can't feel pain like animals with brains. Examples include jellyfish, clams, corals, anemone, sponges.

Pain is an evolutionary feature intended to cue animals to escape to ensure survival. Several animals such as sponges need not escape, as it can reproduce simply by budding and even being shredded alive.