Here's the porpoise:
attack sprite
I'm not sure about the sizing, so if you decide to use this, and if you think it needs resizing, just let me know and I'll fix it.
I hope you'll be able to access these. I tried putting them into a .zip folder, but it didn't work, somehow. So if you need this in a different format, you might need to help me get it set up for you. I don't know why it's being difficult...so I might need a little instruction, if it becomes necessary.