California spiny lobster

Regulations at a glance

Identification

Reddish-brown crustacean with no large claws (the "spiny" not "clawed" lobster). Body covered in spines; antennae long and stout. Carapace is the hard shell of the body, NOT including the tail or rostrum. Measure across the dorsal midline of the carapace from the leading edge between the rostral horns to the rear edge — minimum 3¼ inches. Confusion is rare in California waters — no other large clawless crustacean is targeted by sport anglers here. The "bug" nickname is universal in SoCal vernacular.

Habitat + season

Where they live

Rocky reefs, kelp forests, breakwaters, harbor structure, oil platforms. From the shallow surf zone to 200+ feet. Most accessible recreational fishery is 10-60 feet around accessible structure. Holds in cracks, crevices, and overhangs by day; emerges to forage at night. Smell-driven foragers — they find bait from significant distances.

When they bite

Strictly seasonal. Open early October through mid-March (~5.5 months). Opening week is the iconic peak — the largest catches of the year typically come the opening Saturday night. Bite slows somewhat through the deep winter then picks back up February-March. Year-over-year run sizes vary with ocean temperature and population health; CDFW assesses annually.

Where they hold in the GhostFingers Fish catalog

• Channel Islands shores (kelp + rocky reef) — boat access required
• SB Channel mainland breakwaters (SB Harbor, Ventura Harbor) — hoop net from rocks
• Reef structure at Refugio, El Capitan, and other Channel cobble coves — dive at night
• South of SB Channel breakwaters + harbors — hoop net access

Tactics

Hoop nets (the shore-bound method)

Open-topped circular nets baited with mackerel, anchovy, sardine, or any oily bait. Dropped from a breakwater, pier, or jetty in 10-40 feet. Lobsters crawl into the net to eat the bait; pull the net up quickly to trap them inside. Two hoop nets per person, 10 per vessel maximum. Most productive at night within the first 2-3 hours after sunset.

Free-diving (the boat-or-paddle method)

Night dive on a kelp reef with a dive light and gloved hands. Locate lobsters by spotting eyes reflecting back the light, then grab the body and tail in one motion. Requires confident night-diving skill, proper buddy protocol, and good gear. Most productive in 15-40 feet on a calm-night low-tide window.

Measure + tag immediately

Every keeper MUST be measured immediately upon take and recorded on your report card before being placed in your bag. Undersized fish must be released to the water immediately. The carapace measurement is the legal size — use a calipers or a CDFW-stamped measuring gauge. CDFW wardens check report cards routinely on opening night.

Report card requirements

• Spiny lobster report card required for every lobster fishing trip, separate from your standard CA sport fishing license.
• Buy at any CDFW license vendor.
• Record EVERY take on the card immediately. Include date, location, gear type.
• Report card must be submitted to CDFW at season end whether or not you caught anything.
• Hoop nets must have a buoy attached with operator's name + GO ID printed permanently. CDFW seizes unmarked gear.
• Two hoop nets per person, 10 per vessel maximum.

What the GhostFingers Fish app adds

The static guide above is the foundation. The app layer adds: season-opener countdown in the Watch ribbon (lobster opener is a marquee seasonal event), report card tracker that logs each catch with date + spot + gear (mirrors the paper card), measurement-helper interface (visual guide for the 3¼-inch carapace check), bag counter (7/day), hoop net buoy-marking reminder for first-trip-of-season, and the pattern dashboard that learns which conditions produced your best opening-week nights.