Yes, Blue Tangs and clownfish are good tank mates, and generally ignore eachother.
They might but they might not because they might think that blue tangs are small.
No, Clown fish do not eat crackers
Some fish do, and some fish do not. Parrot Fish, Surgeon Fish, Blue Tangs would eat Kelp. Sharks would not. Basically fish that are Herbivores (plant eaters) would eat Kelp. Carnivores would not.
Yes they are they can eat a baby clown fish
You put your penis in the water and it will eat it.
Blue tangs eat algae, but they don't tend to suck on it.
Of course it can. It can eat anything small enough to fit into its mouth that it wants to.
Sea anemones are known for eating a wide variety of different fish and sea life. These include krill, shrimp, and tangs.
sculpin, flounder, halibut,eel,monkfish,codfish
no
cannibalism (i think that's term your looking for)
While it is possible for blue tangs to be eaten by humans, they are not commonly consumed because they contain toxins that can make them dangerous to eat. Furthermore, blue tangs are not typically targeted for consumption due to their popularity in the aquarium trade and their importance in maintaining reef ecosystems.