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Knot work is one of the most underrated skills in spearfishing. The five knots that handle 95 percent of rigging, line repair, and emergency situations - and why every diver should learn them before depending on them.

Sea urchin barrens and Tijuana River sewage are devastating California kelp forests - not recreational spearfishing or diving. The science behind the decline, and the real solutions: sheephead recovery, urchin culling, and binational cleanup of the Tijuana River pollution flowing north into Imperial Beach and Point Loma.

827,624 fish catch records analyzed over 4 years. Here's what the data reveals about yellowtail, white sea bass, and halibut patterns off San Diego.