Well, honey, the animal you're looking for is a goat. It's got four letters and 'OA' smack dab in the middle. Now, don't go goat-getting yourself into trouble trying to find other animals fitting that description!
Koala is an animal that is four letters long and ends with "oa."
D.O.A.
floating
oa
D.O.A.
The letters OA make the long O sound in goal
Well, isn't that a fun little riddle! The insect you're thinking of is a "roach." Roaches may not be everyone's favorite critter, but they're just trying to find their place in this big, beautiful world. Just like every little bug out there, they have a role to play in the circle of life.
Hey, I've just received a free Minecraft Giftcode! You can get one too! >> minecraftcodes.me <<
The insect is a hornet.
DDT
Bug.