The supposed submarine shaped dark area is clearly a shadow cast by the crane of the boat on the left https://img-s-msn-com.akamaized.net/tenant/amp/entityid/A

The supposed submarine shaped dark area is clearly a shadow cast by the crane of the boat on the left https://img-s-msn-com.akamaized.net/tenant/amp/entityid/AA1rg36P.img?w=768&h=431&m=6 https://img-s-msn-com.akamaized.net/tenant/amp/entityid/AA1r...