To find the weight of one bucket of lobsters, you can divide the total weight of the lobsters by the number of buckets.
The given relationship is:
\[ \frac{450 \text{ pounds}}{25 \text{ buckets}} \]
To find the weight per bucket, perform the division:
\[ 450 \div 25 = 18 \]
Thus, the weight of one bucket of lobsters is 18 pounds per bucket.