Seafood includes swordfish, shrimp, lobster, sea urchin, and squid. Various species such as conger, lobster, sea urchin, octopus and cuttlefish are illustrated. Sapporo is also well known for fresh seafood including salmon, sea urchin and crab. In many regions in China, crab and urchin roes are eaten as a delicacy. Eggs of sea urchin, shortly after fertilization by a sperm, produce hydrogen peroxide. Eventually, corals were able to recover in areas where sea urchin populations were increasing. Maternally deposited mRNAs establish the organizing center of the sea urchin embryo. An orphan boy who also lives as a street urchin in Tarbean. Regardless, these areas are slowly recovering with the aid of sea urchin grazing. As little as 2% of the original sea urchin population survived the disease. Breathing problems may indicate a serious reaction to toxins in the sea urchin. Finally, a five-dollar note is described as a "sea urchin". Tracy also begins fostering a young street urchin named Kid. The series also featured hapless heroes Die Fledermaus, Sewer Urchin and American Maid. Other names include "urchin", "hedgepig" and "furze-pig".