Clamming

Dig at the Clamming Points in Bibiki Bay with a rented bucket. Every find adds weight; overfill the bucket and you lose everything in it. The only way to get Bibiki Urchin besides buying one.

How it works

Rent a bucket from Toh Zonikki in Bibiki Bay for 500 gil. It holds 50 ponze.
Dig at any of the 8 Clamming Points. Each point has a 16-second cooldown after you dig.
Watch the weight. Each find adds its weight. If a find would push you over capacity, the bucket breaks and empties.
Upgrade at Toh Zonikki once you're within 5 of capacity (45, 95, 145): +50 ponze, up to 200. Bigger buckets dig from different tables.
Cash out at Toh Zonikki to receive everything. Full inventory? He holds the rest until next time.
Don't leave the zone. Leaving Bibiki Bay drops the bucket and its contents.

Tides

Low tide while the moon wanes (Full Moon → Lesser Waning Crescent). High tide while it waxes (New Moon → Greater Waxing Gibbous). Each bucket size has its own odds for each tide.

Gear that helps

Swimsuit bottoms +1 (any race): dig cooldown 16s → 10s.
Swimsuit top +1 (any race): 200-ponze bucket incidents 37% → 32%.

Plan a trip: when to cash out

Exact expected results for one rented bucket. Push to each upgrade, then at your target size keep digging only while the heaviest possible find still fits. Net = vendor value of the haul (standard fame) minus the 500-gil bucket; lost buckets count as nothing. Auction prices will differ.

Cash out at	Digs	Bucket lost	Net gil · low tide	Net gil · high tide	Verdict
50 ponze	2.7	0%	−237	−280	Loses money
100 ponze	8.4	34%	+89	−21	Small profit at low tide
150 ponze	11.7	61%	+236	+160	Best
200 ponze	12.9	94%	−249	−255	Bucket almost always lost

What you can dig up

Chance per dig, by bucket size and tide

50-ponze bucket

Only bucket with Bibiki Urchin

Item	Weight	Low tide	High tide	NPC price
Jacknife	11	33.8%	31.3%	55 gil
Bibiki Slug	3	29.9%	43.7%	10 gil
Pebble	7	17.2%	13.4%	1 gil
Shall Shell	6	4.6%	2.3%	300 gil
Clump of Pamtam Kelp	6	3.7%	1.8%	8 gil
Handful of Fish Scales	6	3.1%	1.6%	24 gil
Igneous Rock	35	2.9%	3.2%	180 gil
Crab Shell	6	2.7%	1.4%	383 gil
Bibiki Urchinrare	6	0.5%	0.3%	750 gil
Tropical Clam	20	0.4%	0.4%	5,040 gil
Coral Fragment	6	0.4%	0.2%	1,750 gil
High Quality Crab Shell	6	0.3%	0.2%	3,325 gil
High Quality Pugil Scales	6	0.3%	0.1%	255 gil
Turtle Shell	6	0.2%	0.1%	1,200 gil

100-ponze bucket

Item	Weight	Low tide	High tide	NPC price
Jacknife	11	30.2%	22.3%	55 gil
Bibiki Slug	3	28.7%	32.9%	10 gil
Pebble	7	13.3%	23.3%	1 gil
Igneous Rock	35	6.3%	5.3%	180 gil
Broken Willow Fishing Rod	6	2.6%	1.8%	—
Chunk of Rock Salt	6	2.5%	1.8%	4 gil
Elshimo Coconut	6	2.5%	1.8%	43 gil
Nebimonite	6	2.3%	1.8%	52 gil
Maple Log	6	1.9%	1.5%	15 gil
Loaf of Hobgoblin Bread	6	1.8%	1.5%	90 gil
Hobgoblin Pie	6	1.8%	1.4%	156 gil
High Quality Pugil Scales	6	1.3%	0.9%	255 gil
Goblin Mail	6	0.8%	0.6%	—
Goblin Armor	6	0.8%	0.6%	—
Coral Fragment	6	0.8%	0.6%	1,750 gil
Tropical Clam	20	0.7%	0.6%	5,040 gil
Titanictus Shell	6	0.7%	0.5%	350 gil
Petrified Log	6	0.5%	0.4%	2,150 gil
Elm Log	6	0.5%	0.4%	383 gil

150-ponze bucket

Item	Weight	Low tide	High tide	NPC price
Bibiki Slug	3	25.7%	20.1%	10 gil
Igneous Rock	35	16.2%	15.5%	180 gil
Pebble	7	15.4%	12%	1 gil
Jacknife	11	8.1%	19.4%	55 gil
Goblin Mail	6	3.2%	2.6%	—
Nebimonite	6	3.1%	3.6%	52 gil
Goblin Armor	6	3.1%	2.5%	—
Seashell	6	2.8%	3.1%	30 gil
Chunk of Rock Salt	6	2.7%	3.2%	4 gil
Elshimo Coconut	6	2.7%	2.1%	43 gil
Elm Log	6	2.3%	1.8%	383 gil
Petrified Log	6	2.3%	1.8%	2,150 gil
Bunch of Pamamas	6	2%	2.1%	20 gil
High Quality Pugil Scales	6	1.9%	2.3%	255 gil
Maple Log	6	1.4%	1.2%	15 gil
Loaf of Hobgoblin Bread	6	1.4%	1.1%	90 gil
Hobgoblin Pie	6	1.4%	1.1%	156 gil
Coral Fragment	6	1.2%	1.3%	1,750 gil
Titanictus Shell	6	1.1%	1.3%	350 gil
Tropical Clam	20	0.7%	0.7%	5,040 gil
Lacquer Tree Log	6	0.5%	0.4%	3,500 gil
Piece of Oxblood	6	0.4%	0.4%	13,250 gil
Broken Willow Fishing Rod	6	0.4%	0.4%	—

200-ponze bucket

37% per dig something wrecks the bucket

Item	Weight	Low tide	High tide	NPC price
Igneous Rock	35	18.8%	14.9%	180 gil
Bibiki Slug	3	10.4%	4.8%	10 gil
Bunch of Pamamas	6	9.3%	7.6%	20 gil
Goblin Armor	6	7.5%	9.4%	—
Coral Fragment	6	7.5%	6.6%	1,750 gil
Goblin Mail	6	7.3%	10.9%	—
Seashell	6	7.1%	6.5%	30 gil
Petrified Log	6	7%	9.8%	2,150 gil
Elm Log	6	6.5%	9.7%	383 gil
Titanictus Shell	6	4.6%	4.4%	350 gil
High Quality Pugil Scales	6	4.2%	4%	255 gil
Jacknife	11	3.7%	4.6%	55 gil
Chunk of Rock Salt	6	2.1%	1.7%	4 gil
Piece of Oxblood	6	1.7%	1.4%	13,250 gil
Lacquer Tree Log	6	1.4%	1.9%	3,500 gil
Tropical Clam	20	0.9%	1.8%	5,040 gil