What kind of fish are available and what is their effect?

Solution 1:

According to the list on the Torchlight wikia:

Fish sizes

Normal - Transform for 5 minutes

"Big" - Transform for 15 minutes

"Giant" - Transform permanently, until another fish is consumed. If this is a non-permanent fish/egg, then after that one expires your pet is transformed back into its original form.

Fish Types

Jackal Bass - Transform into a Jackalbeast.

Largemouth Bass - Transform into a Mimic.

Warsnout - Transform into a Warbeast.

Tunnel Shark - Transform into a Molebeast.

Web Fish - Transform into a Spider.

Flying Fish - Transform into a Swampflyer.

Bonefish - Transform into a Torso.

Crab Egg - Transform into a Crab Warrior.

Vampiric Spider Egg - Transform into a Vampiric Spider.

Transformation effects

Jackalbeast: Increase poison armour by ~100% and grants a small amount of poison damage.

Warbeast: Increases base average damage by ~85%.

Spider: Grants immobilizing web attack.

Mimic:

• +25% physical armour
• +66% elemental armour
• +50% HP
• +33% damage (base)
• +90% Interrupt Resistance

Molebeast: 20% chance to Stun target for 3 seconds

Swampflyer: +33% Attack Speed

Torso:

• +20% damage
• +60% elemental
• +25% HP (base)
• Shreds armour

Crab Warrior: - +100% physical armour - +100% elemental armour (base)

Vampiric Spider: - Attacks steal life for you.

Other fish (direct effect on pet, or misc.)

Frenzy Fish - For 5 minutes gain:
- 33% Faster Movement
- +33% Attack Speed

Gold Fish - Not pet food. Just sell it.

Prismatic Morey - For 5 minutes gain the following:
- +25 Critical Hit Chance
- +100% to Fire Damage
- +100% to Poison Damage
- +100% to Ice Damage
- +100% to Electric Damage