This is a close relative to the Dark dolphin. Its albino but also shares a taste for blood
As said from Vinman1138's product page for the original male riding dolphin: (There is one other quirk to this product. You can't "put back" this pet in the IMVU inventory. Instead you must click on the "Avatar" entry in inventory to open it. There look for the "....apply" next to your desired gender of avatar. Click the "apply" button. Your pet should now be back in inventory.)
And the trigger commands are:
Click1 for a sound
Click2 for a sound
Reminder this dolphin is for MALES ONLY!!