Therefore, assuming a wave period of 8 seconds, for a significant wave height of 10 feet, a wave 19 feet or higher will occur every 8,000 seconds (2.2 hours). Wave heights increase dramatically as waves begin to "feel" the bottom near shore or any in shallow water. Typical size: 10-36' height ID: Long stalk anchored to the bottom. Gas-filled floating bulb at end of stalk with multiple long fronds. Comments: Bull kelp is a signature kelp species of the NW. This kelp is the largest and fastest growing of our kelps, growing up to 12" a day during summer. Usually found anchored in shallow rocky areas < 40'.
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