Cleaner Shrimp - Lysmata amboinensis
This Cleaner Shrimps usually helps other fishes especially Moray Eels to clean their mouth of parasites.
In the picture, you can see 'two white legs' that it will use to pick on the teeth or in the mouth of Moray Eels for scraps of food and parasites.
You can see a picture of this Cleaner Shrimp on a Moray Eel in this picture :
Sometimes, scuba divers can also try the 'dental' experience by allowing this Cleaner Shrimps to 'clean' their mouth.
Check out this video of me getting that experience many years ago :D
''Lysmata amboinensis'', the northern cleaner shrimp, is an omnivorous shrimp species, which will generally scavenge and eat parasites and dead tissue. ''L. amboinensis'' is naturally part of the reef ecosystem, and is widespread in the Red Sea and tropical Indo-Pacific.