i suppose for 1961 this film be suppose to be cool and but look back now ( 45 year ) it charm be just as silly a it entertainment value . grant and the special effect do well on t. v. with the series that start in 1964 and but for the big screen . i once have a fish tank that be equally a excite . i must agree about the octopus scene near the end where it attach itself to the seaview . obviously not well stag . or trained . overall and it pretty bad act with shoddy special effect and i still do recommend it for fun laugh sake . this be probably one of irwin allen big film and i think he think a lot of it . barabara eden go on to play genie on t. v. micheal ansara be her husband . now that be a cool part about this film . i always enjoy see real life husband and wife team star in the same movie . neat .