Takoyaki is a little octopus ball – here’s what Wikipedia had to say –
Takoyaki (たこ焼き or 蛸焼) is a ball-shaped Japanese snack made of a wheat flour-based batter and cooked in a special molded pan. It is typically filled with minced or diced octopus (tako), tempura scraps (tenkasu), pickled ginger (beni shoga), and green onion (negi).[1][2] The balls are brushed with takoyaki sauce (similar to Worcestershire sauce) and mayonnaise, and then sprinkled with green laver (aonori) and shavings of dried bonito (katsuobushi).