Snowy Grouper.
Deep-drop trophy. 500–1000 ft, electric reels, big fillets.
How they feed in the Keys
Snowys are the Atlantic deep-drop trophy of the Keys — they hold on hard structure and ledges in 400–1200 feet. The deep Gulf Stream edge off Islamorada and Marathon is classic snowy territory. Heavy electric-reel work, drop multi-hook rigs to bottom with 16+ oz of lead, and you're often onto fish within minutes. Average 8–25 lbs, with trophies into the 50s.
50–62°F at depth
Active 45–68°F at the bottom
Less directly tide-driven (depth dampens surface tide effects), but bottom current still drives feed activity.
Bottom current carries scent and bait. Surface-current variability matters less than the deep flow.
Calm seas required — fishing in 500+ ft requires staying directly over structure. Anything above 4 ft seas makes the technique very tough.
Less impact at depth.
All day at depth.
Less direct correlation. Spawning year-round with peaks April–August.
Less direct.
A Daiwa Tanacom or LP Lectric is the deep-drop standard. Manual cranks at 800 ft are punishing.
Snowy grouper has been very tightly managed in Atlantic federal waters — annual catch limits often close the season early. Always check before targeting.
12-month outlook
What they eat, what catches them
Whole squid
Big whole squid on 12/0 circle hooks. Tough, stays on, snowys love them.
Cut bonito
Fresh chunks of bonito belly. Strong scent at depth.
Large eel chunks
When available — extreme scent attracts from the deep.
- Cut barracuda· Local Keys deep-drop staple bait.
- Mackerel chunks· Backup option, reliable scent.
- Standard deep drop
3-hook deep-drop rig + 16–32 oz lead + whole squid on each hook + electric reel + 80 lb braid. Drop to bottom, reel up 5 cranks, wait.
How top captains rig it
80–130 lb braid (PE 6–10).
Electric: Daiwa Tanacom 1000+, LP Lectric Daiwa-class, or Shimano Beastmaster.
Heavy roller-tip deep-drop rod.
150–200 lb monofilament.
- Deep-drop electric
Roller-tip rod + electric reel with 80 lb braid + 3-hook deep-drop leader + 16–32 oz teardrop lead + whole squid baits.
Recreational rules
No size limit (federal Atlantic; check current FWC).
1 per harvester per day in Atlantic federal/state; counts in 3-fish deepwater grouper aggregate.
Atlantic: closed Jan 1 – Apr 30 for shallow-water grouper, but snowy is in the deepwater grouper aggregate. Annual federal closures common when ACL is hit.
Powerheads prohibited in state waters.
Note · Federal Atlantic snowy is one of the most-restricted species in the Keys. Annual quota often closes the harvest by mid-summer.
What actually moves the bite
Each factor is rated by how much it shifts the bite for this fish in the Keys. Calibrated against the Bite Score weights — see the Bite Score reference for what each factor measures.