Eventually, corals were able to recover in areas where sea urchin populations were increasing. Breathing problems may indicate a serious reaction to toxins in the sea urchin. Sapporo is also well known for fresh seafood including salmon, sea urchin and crab. It is also one of several bacteria that can cause bald sea urchin disease. There are typically three valves that make up the jaw of sea urchin pedicellaria. Maternally deposited mRNAs establish the organizing center of the sea urchin embryo. Seafood includes swordfish, shrimp, lobster, sea urchin, and squid. Various species such as conger, lobster, sea urchin, octopus and cuttlefish are illustrated. Regardless, these areas are slowly recovering with the aid of sea urchin grazing. Pangasinan's aquaculture includes oyster and sea urchin farms. Important to the sea urchin blastula is the ingression of the primary mesenchyme. A similar phenomenon occurs in the sea urchin, "Strongylocentrotus droebachiensis". As little as 2% of the original sea urchin population survived the disease. Cyclin A was first identified in 1983 in sea urchin embryos. This activity is important in limiting sea urchin populations, and so maintaining healthy seabed communities.