The cod glue bought from the purchasing office smells like squid, so it is not sure whether it is true or not. However, the following are some suggestions to distinguish between true and false cod glue:

1. Observe the appearance: Real cod gum usually appears light yellow or light white, and has natural texture and luster. If the fish glue looks too transparent or the color is too uniform, it may be fake.

2. Smell: Real cod glue usually has a faint smell of seawater. If there is any pungent smell, it may be fake.

3. Check the texture: Real cod glue usually has certain toughness and elasticity. If it feels too soft or fragile, it may be fake.

4. Ask about the source: communicate with the purchasing agent to understand the source and manufacturing process of cod glue. If purchasing can provide detailed information and proof, then buying cod glue may be true.

To sum up, just because it smells like squid can't determine whether the purchased cod glue is true or not. Buyers are advised to observe, check and inquire in many ways to increase the protection of purchasing genuine cod glue.