The scarlet frogfish is also missing numerous spines along its back. Similar to all frogfishes, "A. coccineus" is a voracious carnivore which devours all small prey that enters within its reach. Like other members of the Antennariidae family, it has a solitary and benthic lifestyle, only tolerating each other for the simple act of fertilization. Frogfish express various behaviours when feeling threatened. To prevent attacks, they will either remain as still as possible, using their camouflage to hide or else they will use Batesian Mimicry. This is where a prey animal will mimic other dangerous species to prevent predators attacking. "Antennatus coccineus" is known to do this by resting on the seafloor in the way a sea urchin would or else picking up similar behaviours to the poisonous scorpionfish . Once attacked by a predator they use their mouths powerful suction to swell their whole body with water, making it difficult for any predatorial animal to swallow it . A unique behaviour to the family Antennariidae is the unique form of locomotion they have . Many of the fish in this family, including "Antennatus coccineus", can take water in through the mouth and expel it through gill openings similar to tubes, located behind its pectoral fins. Using powerful exhalation, it can propel itself forward and often does so to help ambush its prey  . Antennatus is also mainly nocturnally active however still catches prey during the day time   The scarlet frogfish only comes together with other frogfish for reproduction purposes during mating seasons. It lives within tropical waters and has a central distribution being around Indo-East-Pacific. Female and male frogfish are physically different, with the female being oviparous . The female frogfish will start producing eggs when she is ready to mate. The extra mass of eggs inside of her causes her body to bloat, becoming larger and more buoyant with the added air space. This bloating will attract males who see the female as ready to reproduce. Males can follow the female for up to two days before the fertilisation process begins  . The male will then nudge the female, with use of her added buoyancy, all the way to the surface where she will then release the eggs to be externally fertilised by the male frogfish. The eggs come together to form a floating gelatinous spawn or a raft, where they will then stay in the open ocean water until they hatch.