The Beluga is noteworthy for its first appearance in X: Beyond the Frontier during the game's tutorial. This makes it the oldest canonical Terran missile in terms of age, even if the X lost its compliment after the jump.
This is the popular Terran missile called the Beluga. It is the standard earth fleet missile used onboard fighter craft.
The Beluga is a Terran missile, but curiously is only compatible with Commonwealth ships except for the X Shuttle, who can still use them. It is capable of demolishing all but the heaviest of fighters in one hit, and its high compatibility mean that one can pop out of a launch tube in pretty much any fight. They are rare, however, and cannot be bought or manufactured anywhere.