The term 'Arm of the Sea' refers to a body of water that is connected to an ocean or sea. An INLET is a narrow body of water that connects to a larger body of water, such as an arm of the sea. A TENTACLE is a long, thin, flexible organ found on some animals, such as octopuses and squids. An ESTUARY is a partially enclosed coastal body of water where freshwater from rivers and streams mixes with saltwater from the ocean. A tacle is a slender, flexible appendage found on some animals, such as starfish. All of these terms are related to the term 'Arm of the Sea' and provide insight into the features of this type of body of water.