If we put our neurons to work, some insights may surface, right? A fish has a body that suits its watery environment. Humans have bodies suited for the earth environment, and spirit beings have bodies suited for the spirit realm. That´s why the spirit creature referred to as the Word, Jesus in his pre-human existence, had to become flesh to reside on earth.
John 1:14
So the Word became flesh and resided among us...
1 Cor 15:37-40
And as for what you sow, you sow, not the body that will develop, but just a bare grain, whether of wheat or of some other kind of seed; 38 but God gives it a body just as it has pleased him, and gives to each of the seeds its own body. 39 Not all flesh is the same flesh, but there is one of mankind, there is another flesh of cattle, another flesh of birds, and another of fish. 40 And there are heavenly bodies and earthly bodies; but the glory of the heavenly bodies is one sort, and that of the earthly bodies is a different sort.
Verses 44-45
It is sown a physical body; it is raised up a spiritual body. If there is a physical body, there is also a spiritual one. 45 So it is written: “The first man Adam became a living person.”* The last Adam became a life-giving SPIRIT.
Consequently, Jesus couldn´t be resurrected to the spirit heavens in the same fleshly body he had on earth when he was a human. After all, flesh and blood are not suited for God´s Kingdom. (1 Cor 15:50) Accordingly, the Bible makes clear that he was put to death "in the flesh" but resurrected "in the spirit." (1Pe 3:18) Yes, on being resurrected Jesus received a spiritual body.
Likewise, Christ´s brothers, Christians with a heavenly hope, "spiritually begotten as “God’s children,” are promised a resurrection like his. (Re 17:14; Ro 6:5; 8:15, 16; Heb 2:11) The apostle Peter writes to fellow Christians: “Blessed be the God and Father of our Lord Jesus Christ, for according to his great mercy he gave us a new birth to a living hope through the resurrection of Jesus Christ from the dead, to an incorruptible and undefiled and unfading inheritance. It is reserved in the heavens for you.”—1Pe 1:3, 4.
Peter also describes the hope such ones possess as “precious and very grand promises, that through these you may become sharers in divine nature.” (2Pe 1:4) They must undergo a change of nature, giving up human nature to obtain “divine” nature, thus sharing with Christ in his glory. They must die a death like Christ’s—maintaining integrity and giving up human life forever—and then they receive immortal, incorruptible bodies like Christ’s by a resurrection. (Ro 6:3-5; 1Co 15:50-57; 2Co 5:1-3) The apostle Paul explains that it is not the body that is resurrected, but rather, he likens their experience to the planting and sprouting of a seed, in that “God gives it a body just as it has pleased him.” (1Co 15:35-40) It is the soul, the person, that is resurrected, with a body to suit the environment into which God resurrects him."