Trait
Dissolution Spread
For each Poison-type skill brought into battle, Water-type skills inflict 1 stack of Poison on enemies.
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NO.076
Seahelm Bug
Worn Form
Water Poison Phase I Regional Form
If you see many creatures with short spines emerging from the water, those are Seacap Bugs breathing. They don't attack actively; their spines are short and rounded. If you touch their spines with your hand, you'll feel a gentle prick—not very painful.
Dex Number
076
Category
Spiky Creature
Height
0.55~0.7 M
Weight
7.4~8.6 KG
Updated
2026-04-02
Distribution
Commonly found in oceans
Recommended Skill Sets
Poison Stack Attrition Build
Playstyle
Rapidly stack Poison layers, using Venom Infiltration's cost reduction mechanism for sustained output. Bubble Illusion preserves life to stall turns, letting Poison damage gradually accumulate.
Why this set works
Maximize 'Dissolution Spread' trait: Dual Poison skills (Corrosive Acid + Plague Breath) activate trait, adding Poison to Water skills; Venom Infiltration as main damage enjoys Poison stack cost reduction and damage boost, Bubble Illusion ensures survival. Core strategy: Poison stacking attrition
Corrosive Acid
Why pick this skill
Core Poison-type skill. Deals magic damage directly and applies 2 layers of Poison, quickly stacking poison layers while triggering trait to add poison effect to Water-type skills.
Plague Breath
Why pick this skill
0 Energy: Poison-type skill, can actively stack Poison layers, used with Trait, creates activation conditions for Venom Infiltration and Corruption.
Venom Infiltration
Why pick this skill
Core damage skill with energy cost decreasing with more enemy Poison stacks (minimum 0), and can apply additional Poison. Forms double Poison stacking with Trait.
Bubble Phantom
Why pick this skill
Survival skill. 80% damage reduction + retreat when responding to attack. Compensates for Sea Helmet Bug's low base stat survival weakness, ensuring poison stacking process completion.
Energy Linkage Burst Build
Playstyle
Use Water Storage for pre-charge on turn 1 or key turns, subsequently release high-Power Spring or low-cost Venom Infiltration for burst damage, Plague Breath to maintain Poison stacks and secure skill value.
Why this set works
Use 'Water Storage's energy cost reduction linked with 'Spring' power boost mechanic (-6 cost = +60 power), while carrying Poison-type skills to trigger trait for poison application on Water-type skills; Venom Infiltration as another damage source enjoying poison cost reduction. This build balances burst and sustained output.
Water Storage
Why pick this skill
0 Energy Cost skill. Next skill energy cost -6. Allows high-cost skills (Venom Infiltration, Infection) to release early, or gives Spring Burst higher power bonus.
Venom Infiltration
Why pick this skill
Core damage skill. Combined with Water Storage to significantly reduce actual Energy cost. The more Poison stacks the enemy has, the cheaper it becomes. Also applies Poison maintenance stacks.
Spring
Why pick this skill
Water-type damage skill, +10 power per -1 energy cost. Combined with Water Storage's -6 energy cost, can reach 60 power. Also triggers trait to apply 1 stack of Poison.
Plague Breath
Why pick this skill
0 Energy: Poison-type skill, used to quickly activate Poison layers, allowing Venom Infiltration and Gushing Spring to reach full benefit state faster.
Support Weakening Build
Playstyle
Quickly stack Poison layers then use Corruption to greatly weaken enemy output capability, use Bubble Phantom to evade damage, serves as disruption support role in team, allowing teammates to output safely.
Why this set works
Abandons active output, focuses on support weakening: Corrosive Acid + Plague Breath rapid Poison stacking. Corruption massively reduces enemy dual Attack (2 stacks = -60%). Bubble Phantom ensures self-survival. Suitable as team interference support, creating output environment for teammates.
Corrosive Acid
Why pick this skill
Core Poison-type skill. 2 layers of Poison for quick startup, creating conditions for subsequent Corruption and Venom Infiltration.
Corruption
Why pick this skill
The more poison layers on the enemy, the greater the dual attack reduction ( -30% per layer). Just 2 poison layers means -60% dual attack, strongly weakening enemy output capability.
Plague Breath
Why pick this skill
0 Energy: Poison-type skill, can flexibly supplement Poison layers, ensuring Corruption's attack reduction effect and Venom Infiltration's energy cost reduction effect remain active.
Bubble Phantom
Why pick this skill
Survival method against enemy high output, 80% damage reduction + retreat can effectively avoid fatal damage
Notes
- Helmet Crab is a Stage I creature with low base stats (326), unsuitable as a main damage dealer, better suited as a support/stall-type creature
- Trait 'Dissolution Diffusion' requires Poison-type skills to activate. For each Poison-type skill carried, Water-type skills inflict 1 Poison layer on enemies.
- Helmet Crab possesses a rich variety of Poison-type skills (Corrosive Acid, Plague Breath, Venom Infiltration, Poison Mist, Infection), allowing for flexible combinations
- The skills 'Water Storage' and 'Salt Bath' provide Energy cost reduction, which synergizes with the 'Spring' mechanic of Energy cost -1 and Power +10
- 'Bubble Mirage' provides 80% damage reduction and disengage when responding to attacks, an excellent survival skill
Gallery
True Body
Fruit
Pet Egg
Evolution Chain
Skills
Lv. LV1
Water Splash
Energy: 30
Deals Magic damage. Self recovers 1 Energy.
Lv. LV4
Water Storage
Energy cost of next Skill used -6.
Lv. LV13
Corrosive Acid
Energy: 35
Deals Magic damage. Enemy gains 2 Poison stacks.
Lv. LV17
Corruption
For each Poison stack the enemy has, enemy gains -30% ATK and MATK.
Lv. LV27
Wishing Star
Energy: 110
Deals magic damage to the enemy creature.
Lv. LV28
Plague Breath
Enemy gains 1 stack of Poison Mark.
Lv. LV35
Bubble Phantom
80% damage reduction, when responding to an attack: retreat.
Lv. LV36
Venom Infiltration
Energy: 120
Deals Magic damage. For each Poison stack on enemy, this skill's Energy Cost -1, and enemy gains 1 Poison stack.
Lv. LV38
Poison Mist
Converts all enemy buffs into Poison.
Lv. LV41
Spring
Energy: 60
Deals Magic damage. For every -1 Energy Cost of this skill, Power +10.
Lv. LV48
Saltwater Bath
Self gains -2 All Skill Energy Cost, Against Defense: changed to -3 Skill Energy Cost.
Lv. LV50
Infection
Energy: 85
Deals Magic damage. If it defeats the target, converts Poison into Poison Mark.
Matchups
Weak Against
Electric, Earth, Phantom, Dark
Stats
HP 70
Physical Attack 25
Magic Attack 60
Physical Defense 44
Magic Defense 64
Speed 63
Total 326
Handbook Tasks
Seahelm Bug's Tome Mission
Progress: 7/7
Catch 1 Pokémon
Target: 1
Catch 1 Pokémon with Amazing Talent
Target: 1
Successfully evolve a creature 1 time
Target: 1
Confirm 2 different forms of Sea Helmet Bug
Target: 2