The dogfish sharks, are not known to attack people, but it's best to leave the waters when they are in a pack. Red, brown, yellow and water jellyfish can leave a painful sting, and are a nuisance, check your gear before removing masks and gloves. Most divers will leave the water if killer whales are in the vicinity. Lingcod has been known to attack divers, males when guarding eggs may be aggressive. The ratfish has a poisonous spine in front of its dorsal fin.
Sea urchins have sharp spines and have known to puncture and damage dry suits.
Do not touch sea lions. Also, avoid waters where sixgill sharks are prevalent. The wolf-eel with its strength can cause bad bites. The reasons for diving are many, but as more and more divers take to the waters, it's essential to protect the marine life and the ocean environment. Some dive to collect the delicious crustaceans, others to just observe the marine life or to explore the old wrecks and archaeological sites found on the ocean floors.